The timer and the thermostat should not affect the preheating process or a combi-boiler, however. If the pump stops when one of the grey wires is disconnected then you have a faulty microswitch - follow the wire to locate which valve it is on. When in timer mode, and it should be off, it's on and on changing the desired temperature to below ambient, it will turn off. Got an Eco option button on the boiler? You may find a blown fuse, loose wires, or other obvious faults that can be repaired. Heating, Home Heating Systems (31117 other questions). At times you might have found yourself questioning as to why my boiler stays on when timer is off. G.keen on 2nd December 2016 at 8:01 am My combi boiler goes off 4to5 minutes of being on. If you are having trouble turning your boiler off, then the problem could be that these valves are stuck in the “on” position. When power to the valve is disconnected, a spring inside … A simple mechanical timer usually gives you three options for running a central heating system: the boiler is off; the boiler is providing heat; the boiler turns on and off at set times. The pumps on the Greenstar CDi range have a permanent live feed to them. Boilers will naturally lose pressure over time for a number of reasons, most of which are nothing to be concerned about. my friendly plumber disconnected the valve that enables or disables flow to the heating but I have since reconnected that one. jryan123. If your boiler keeps losing time then you’re definitely dealing with a faulty timer clock. The boiler is on setting 5 of 7 (67 degrees) and the Hive thermostat is set to 21 degrees. Reply. Hmmm, went back up to bed, fell asleep but I'm a light sleeper and was awoken at 1am by the boiler making its noise as if it was on! I have an IDEAL icos he28 boiler and even when the programme is off, the status it always 'C'. One such example of this is an older boiler that continues working even when the thermostat is turned down and the programmer is off. Really appreciated your advice.PaulineOct 2020. When the Timer or Manual switches it off, the burner should go out within a number of seconds, however the Boiler will continue to make sounds because the Pump (and Fan) usually stay on for a while pushing water around the closed system! In this case, … home improvement and repair website. Apologies in advance for the dumb question and lack of detail - can obvious... Troubleshooting two-wire thermostat system. Attempting At times you might have found yourself questioning as to why my boiler stays on when timer is off. Recap There are two main reasons that your radiators will stay hot when your heating is off. If your boiler is an all-in-one combi boiler and it is turning itself on and off every now and again, this is likely to be what is called its ‘Pre-heat’ function. Sometimes it's just a bit of grit stuck in the microswitch and can be cleared. What Are the Advantages to Having a Room... What Are the Advantages to Having a Room Thermostat. I have a Worcester Bosch combi boiler controlled by Hive wireless room thermostat. Just checked and was same issue as last time the valve switch stays on when the valve closes. Switched off the CH altogether at the timer, but the boiler didn't shut down Hot water was also off. My boiler is still firing up and heating water and some rads despite both the heating and water heating being switched off by the timer clock (Randall 702). If the stat wasn't turning off the heating (or boiler) it (as i'm sure you will know) is being fed from the microswitch on a valve. (Add your answer here. Mechanical boiler timers explained. Installing two heating 'stats in parallel? 1995-2018 MH Sub I, LLC dba Internet Brands. Most manufacturers (Honeywell) see a replacement kit for the internal parts. Questions of a Do It Yourself nature should be Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. Older types of heating systems use a boiler that keeps water hot all the time. Mike the plumber u r a star :0))) had this problem followed your grey wires and can now sleep:0))) thank you, To Mike the Plumber, thanks for the advice on the grey/orange wire. This is normal, and the length of time depends on the pipework, make of Boiler, and how it was set up, etc. If the boiler does not respond, then you should remove the thermostat control from the wall and take off the wiring at the back (after turning off the main current). Troubleshooting a Hydronic Heating Syste... Troubleshooting a Hydronic Heating System. I burnt out the ignitor and just replaced it. The next area to look is at the programmer. certain zone valves when the microswitch sticks on them will keep the pump running and fire the boiler even when in the off position , any more details? When we turn the heating off, it stays on for another couple of minutes, then we hear it click off - no problem. But after replacing the thermostat, my boiler and the hot water red light on my Honeywell ST699 programmer will switch on at the set “ON” time but will stay on even after it reached the set “OFF” time as programmed. Last night though I realised around 11 that the boiler hadn't gone off. frost stat is a likely suspect , but do you have a 3 port valve on your system or 2 zone valves? Got an Eco option button on the boiler? The heating valve remains loose now and the hot water valve is as before. Both thermostats are turned off. suggestions. Remove each grey wire in turn (turn the power off when you do this as they may be live!). If so this normally means it will give you hot water out the tap instantly all the time rather than having to run it for a few mins. You have the option of switching your boiler off or putting it on a continuous setting, meaning it stays on until you decide to turn it off. Best Answer . My boiler continues to fire even though the heating and water are off on the control panel and the thermostat is turned to zero. My boiler is still firing up and heating water and some rads despite both the heating and water heating being switched off by the timer clock (Randall 702). A while after the timer goes off, the boiler boots up again. Thanks. Heating engineers are classed as key workers and are providing quotes as long as no one in your household has Coronavirus symptoms and social distancing guidelines are followed. For example, if you have a 20kW boiler connected to a 15kW radiator load, because the boiler is providing more heat than the radiators can emit, the water would slowly get hotter and hotter until it was actually boiling. 2 2 Answers from MyBuilder Heating Engineers. Try to include as much detail as possible. American Standard Furnace 6 red flashes Code. This is nothing to worry about as it is the heat exchanger heating up intermittently so it is ready to produce your hot water on demand. it switches the boiler off … Customer: replied 7 years ago. Click here for Frister & Rossmann repair information. Be careful about how you release these valves, as they are powerful and can damage your fingers. 1) Malfunctioning Check Valve. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. 1 to 10 of 10. buildersmate. I work at a church/school and they have this old school boiler in one of th... Combi Boiler Pours Lukewarm Water from T... Combi Boiler Pours Lukewarm Water from Taps. If no change occurs, we recommend contacting a Gas Safe engineer to diagnose the fault. That depends on the design of the boiler. Hi. Heating, Convector HeatersHeating, Fan HeatersHeating, Oil Filled Radiators Full list. When in timer mode, and it should be off, it's on and on changing the desired temperature to below ambient, it will turn off. Plumb Services London. Conclusion. By firing I mean that the boiler stays on after the programmers turned off - the pilot light is basically coming back on again. I have an … Recap There are two main reasons that your radiators will stay hot when your heating is off. If the pump is always running, there are generally 3 causes for this: The speed control wire (purple, white and black) going to the pump is damaged - check continuity and connection. UPDATE: thank you for the 2 answers however I've checked and comfort mode is off but the boiler still fires up constantly when no water is running and the heating is off. I went downstairs to check, the rads were cold and the boiler not firing but making its usual humming sound. Read how to breath new life into a broken boiler that's losing pressure.. It’s super easy – one check and one tap turn. Logical as the Timer tells the valve to open, the valve confirms to the boiler it is open / fires it. I don't have the eco button on. When we turn the heating off, it stays on for another couple of minutes, then we hear it click off - no problem. All day/Once – Your system will kick in from the first ‘on’ setting you have programmed in for the day and will stay on until the last ‘off’ setting. So when the Receiver asks the boiler to heat, there is a voltage present.When the reciever is switched off by the app, the voltage disappears and the bolie4 goes off. Is C50GKWF, it has a small duel cooker? Plumb Services London. Mechanical timers usually have a large round dial with a 24-hour clock printed in the central part. howtomendit.com costs nothing to use and you can ask a question without an account or logging in. Print page before using information supplied via this website. You can check the power to the thermostat by wiring it to another programmable device, and leaving it to go off. Including this, there are a number of other problems that can arise with the timer to leave you scratching your head. Reply. In the meantime, check the rest of the boiler. Place the thermostat face down on a counter, and open the back. Just checked and was same issue as last time the valve switch stays on when the valve closes. Mechanical boiler timers explained. Turned it off at the wall and unsure what is wrong( costly?!) It transpires that the forstat was fine and the problem was the switch a replacement potterton myson msv222 did the job. But it stays on when the heating is bein used .whats the possible fault . The only way to stop it is to turn the actual boiler to 'heating off'. jryan123. Best Answer. I went downstairs to check, the rads were cold and the boiler not firing but making its usual humming sound. However it just completely ignores this and stays on all the time! It's now silent (I don't know what the noise was - just the sound I always hear in the airing cupboard so would assume its the hot water or something like that). Turning a timer off is easy. Place the thermostat face down on a counter, and open the back. While each of these are much easier to fix. Hi all, Please someone guide me! When I turn the power on at the panel and the boiler emergency shut off switch the boiler runs and doesn't shut off. repairs can be dangerous. Boiler keeps switching itself off; Boiler is not responding to the thermostat; NOTICE: You can still get boiler quotes during the COVID-19 lockdown. I then turned my attention to the motor and found that the motor itself was not moving thus the microswitch was not being triggered. (The boiler fires up and down until the heating reaches the thermostat setting. If the boiler is still not shutting down, then you will need to consider other causes. professional. Mechanical timers usually have a large round dial with a 24-hour clock printed in the central part. This just happened all of a sudden. Examine the shut-off temperature controls, particularly the low-temperature switch, which keeps the boiler running if it thinks that the water inside is not being heated. Your old mechanical clocknot automatically catching up with seasonal clocks changes 2. Ordered a new sun valve as a result, thanks again Philip. In the interim, remove the actuator and carefully work the valve by screwdrivers and pliers to free it up until your kit arrives. To prevent … To mend any household, kitchen, or other electrical appliance start here. Also at the same time it clicked and became lose, the noise in my airing cupboard went. You have the option of switching your boiler off or putting it on a continuous setting, meaning it stays on until you decide to turn it off. 2 2 Answers from MyBuilder Heating Engineers. All day/Once – Your system will kick in from the first ‘on’ setting you have programmed in for the day and will stay on until the last ‘off’ setting. Wednesday 4th February 2015. You could attempt to test this issue yourself by turning your thermostat temperature levels down to see if this brings about any change, you could also try to replace the device’s batteries. The boiler has a Honeywell thermostat and relay switch model # R8285D-1026. Dont like blogs because you end up overwhelmed by conflicting information....... however, last night my house turned into a sauna.... Spot on regards dodgy micro switch in valve, one tap and pump stopped. If the pump is always running, there are generally 3 causes for this: The speed control wire (purple, white and black) going to the pump is damaged - check continuity and connection. Gas boiler (combi) switches off before reaching the temperature set on thermostat. The hydronic heating system for my 2-story house is on one zone. It dripped some water the day before but continued to work( plus we weren’t 100% sure it was the boiler at time) then about 12 hours later it is a slow drip again on bottom left and there is no power to the boiler. It's the valve sticking down in the heat position. It's now silent (I don't know what the noise was - just the sound I always hear in the airing cupboard so would assume its the hot water or something like that). In fact, half an hour later, they still feel red hot. A simple mechanical timer usually gives you three options for running a central heating system: the boiler is off; the boiler is providing heat; the boiler turns on and off at set times. In many instances work should only be undertaken by a qualified heatingforce says: March 5, 2018 at 11:24 am. When power to the valve is disconnected, a spring inside … +1hr/Boost – Your heating will come on for a boost of warmth lasting one hour. Why is the pump running constantly on a Greenstar CDi boiler? Your room thermostat settingstelling the boiler not to come on 5. If the boiler does not respond, then you should remove the thermostat control from the wall and take off the wiring at the back (after turning off the main current). When my timer on my boilers ends (eg. If so this normally means it will give you hot water out the tap instantly all the time rather than having to run it for a few mins. But it is not. DoItYourself.com®, founded in 1995, is the leading independent Boilers that can modulate their flame may stay on, but older boilers that just switch the burner 'on' and 'off' may not stay permanently lit. It dripped some water the day before but continued to work( plus we weren’t 100% sure it was the boiler at time) then about 12 hours later it is a slow drip again on bottom left and there is no power to the boiler. But then, even though the central heating has definitely clicked off, it takes quite a long time for the radiators to cool down - way longer than it did before. Nothing lights up, I can just hear hot water rushing through the pipes. If the thermostat is calling for heat the boiler should ideally be firing constantly until the house is up to temperature.. That depends on the design of the boiler. Best Answer. Both thermostats are turned off. I have a Worcester Bosch combi boiler controlled by Hive wireless room thermostat. A while after the timer goes off, the boiler boots up again. A while later it was back down to 0V. In the end the only way I could shut off the boiler was by switching the boiler off altogether. I have a combi boiler + it keeps firing up when the heating + water are off. Wednesday 4th February 2015. If, upon examination, the valves seem to be stuck, you should call in a professional to remove the system and fix the problem. Eventually, the boiler will stop but the red light will still remain lit. There are a few reasons your timer clock may have stopped working. However, when I came home this afternoon the boiler was again on despite the timer being off. Including this, there are a number of other problems that can arise with the timer to leave you scratching your head. I don't know if this will help or not. If the two devices don't match, try removing the control switch, and then retesting your boiler. BOILER STAYS ON AFTER TIMER ENDS? I wasn't quick enough with the multimeter to see if an external control was asking for heat, by the time I got there the boiler had shut down again. UPDATE: thank you for the 2 answers however I've checked and comfort mode is off but the boiler still fires up constantly when no water is running and the heating is off. It has been doing it constantly day + night for the past couple of days. The boiler is on setting 5 of 7 (67 degrees) and the Hive thermostat is set to 21 degrees. When it's off the LED flashes and then when it fires up the LED stays on. Copyright© The radiators are hot. Circulator continues to run because the valve piston (stuck down) cannot rise to switch off the pump. (As the cylinder heats up, so will the hot water return. View our Privacy Policy here. This controls the operation of the boiler, even overriding the thermostat. Nothing lights up, I can just hear hot water rushing through the pipes. Reply. If so is it off. If your boiler is no longer under warranty or is older than 10 years old, however, it may be worth considering replacement of the entire boiler, instead of the check valve alone. However it just completely ignores this and stays on all the time! I know from the manual that when the LED is on the boiler is working and when it's flashing the required temp has been achieved so it turns off. Ensure you have read our Small The clock resettingdue to the power being out for a while (especially if you have an older boiler) 3. The boiler is a Worcester Danesmore 12/14 with a ACL Lifestyle control panel with addition thermostat. Reply. It seems to come on at random. This can cause problems with overheating the house, not to mention the cost of constantly having the boiler running. Ergo the boiler may need to shut itself off for a short while. I know from the manual that when the LED is on the boiler is working and when it's flashing the required temp has been achieved so it turns off. If your boiler's not working, and it's simply low on pressure, you'll be back up and running in no time. I have a timer that can be set to have hot water only, or hot water and heating and I have it set for hot water on 1 hour morning and night and heating on in morning 1 hour and then evening, depending on the weather, 4 hours. Depending on what type of heating system you have, the radiator can stay hot for different reasons. Advance – This moves the timer to the next ‘on’ or … I have an IDEAL icos he28 boiler and even when the programme is off, the status it always 'C'. It did still register 11V on the external controls signal, which made no sense at all. Check for loose wires, and replace the fuse. Does anyone know what is wrong. You … 11 posts. So the boiler needs to provide much less heat to this water before it sends it around again. Thanks. Just because the boiler was switching on and off doesn't necessarily mean it was obeying the cylinder 'stat, it could be just 'modulating' - turning itself on and off to control it's output. The more detail and information you provide in your question the easier it is for others to help you. By firing I mean that the boiler stays on after the programmers turned off - the pilot light is basically coming back on again. Customer: replied 7 years ago. It seems to come on at random. If none of these answers have solved the problem of your boiler constantly running, then you should remove your boiler from the power supply, and check all of the wiring. However, if your timer switches itself on and off sporadically – making the house too cold – it could actually be a faulty thermostat causing the problem. One of the 2 way motorised valves had a switch problem that caused the pump to go and boiler to fire. You … Check the Thermostat. What we're having to do is manually turn the boiler off and on in the morning and evening otherwise it would stay on all the time. I have an older system with both pump for h … read more boiler comes on for 20 mins @ 6.10 am for hot water then off at 6.30 then boiler comes on for 1hr @ 6.50am for heating and off @ 7.50 am then i had to come back after school run as forgot something at around 9.00am and found house relay hot, boiler on heating rads and hot water but the wall timer was off and the wall thermostat off. Inside the relay connection, valves allow the flow of gas to and from the boiler. 1) Malfunctioning Check Valve. Gas boiler (combi) switches off before reaching the temperature set on thermostat. boiler still runs even when thermostat is off Thanks for posting. Have just had the exact same problem with the pump running continuously and found as stated above that one of the microswitches in the motorized valve was on all the time......pressed it manually a few times and is now working fine till I get a replacement m/switch just in case....thanks to whoever posted that reply it's saved me a call out. Also at the same time it clicked and became lose, the noise in my airing cupboard went. If both thermostat and timer are on, power goes to the zone valve motor which opens the valve, when fully open this activates a switch in the valve which then supplies power to the boiler & pump. Hot water from the boiler rises and travels by natural convection up to the radiators. In fact, half an hour later, they still feel red hot. So now put the app into manual mode and let it run by its scheduled off time whilst still in manual and then turn off the heating using the app. Other users of howtomendit.com provide the answers. I had a plumber change my timer, which still didn't solve the problem. What we're having to do is manually turn the boiler off and on in the morning and evening otherwise it would stay on all the time. The boiler has a Honeywell thermostat and relay switch model # R8285D-1026. This is completely normal, and is there to ensure you have hot water when you turn it on. You should also check the relay connection, where the control is joined to the side of the boiler. My boiler continues to fire even though the heating and water are off on the control panel and the thermostat is turned to zero. We welcome your comments and Thanks for all your suggestions. Last night though I realised around 11 that the boiler hadn't gone off. Had same problem with Weil McClain boiler which has a 3-way valve with an actuator. However, in some cases when a boiler keeps firing up every few minutes and then quickly turns off again it could indicate a fault. Tam (Poor plumber with hopefully only another 10 or so years more left doing this garbage) F. fog. ), (Enter your name as you wish it to be displayed.). I got it to stop by taking the panel off the boiler and turning the temperature dial down on the inside of the boiler. Turning a timer off is easy. The pumps on the Greenstar CDi range have a permanent live feed to them. Update: have tried the on off button at the mains. Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. boiler still runs even when thermostat is off Thanks for posting. My boiler pump runs continuously and fires even when timer switch is off? It fires up, stays on for a few mins, goes off for a few mins + then does it again. Place the thermostat face down on a counter, and open the back. 70 months. Older types of heating systems use a boiler that keeps water hot all the time. Working with an older boiler, you may sometimes come across problems that seem unusual, or which don't correspond to anything in the manual. 11 posts. Turn off the power again, and remove this from the wall. Hmmm, went back up to bed, fell asleep but I'm a light sleeper and was awoken at 1am by the boiler making its noise as if it was on! +1hr/Boost – Your heating will come on for a boost of warmth lasting one hour. Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. The heating valve remains loose now and the hot water valve is as before. Raise it manually and you will hear the pump go off. A blown-out fuse 4. to this site, and use it for non-commercial use subject to our terms of use. When I turn the power on at the panel and the boiler emergency shut off switch the boiler runs and doesn't shut off. problems contact [email protected] I don't have the eco button on. A thermostat fault may be causing your boiler to continue to fire up and stay on. 6am-9am) even after the end time the boiler remains on and hot water and central heating are on. When it's off the LED flashes and then when it fires up the LED stays on. It is called short cycling and is likely to make your heating bills more expensive and, in the long term, will cause damage to the boiler. Any ideas why its doing this?? A Boiler Question Tukisk/English plumbing. If your boiler is no longer under warranty or is older than 10 years old, however, it may be worth considering replacement of the entire boiler, instead of the check valve alone. ljs_85. This is normal, and the length of time depends on the pipework, make of Boiler, and how it was set up, etc. While each of these are much easier to fix. When the Timer or Manual switches it off, the burner should go out within a number of seconds, however the Boiler will continue to make sounds because the Pump (and Fan) usually stay on for a while pushing water around the closed system! Website operating I checked this while motorised valve was still assembled and found that the power was flowing as soon as the main switch was put on. I have just had this problem with a Potterton Netaheat 12/22. All rights reserved. If both thermostat and timer are on, power goes to the zone valve motor which opens the valve, when fully open this activates a switch in the valve which then supplies power to the boiler & pump. Motorised zone valves in the heating circuit have micro-switches in them to fire the boiler only when they are powered open, but could be stuck in the on position even when the valve is closed - this would show as the boiler firing but no heat circulating in the radiators. If so is it off. A more serious problem with your boiler Could it be any of these? Should have added that the froststat is potterton prt100 and the boiler a potterton f60 primaF. You should also check the temperature of the water. , you should also check the rest of the boiler off altogether just it... Llc dba Internet Brands all of the boiler stays on when timer off have just had this problem your. Red light will still remain lit noise in my airing cupboard went for non-commercial use subject to our DoItYourself.com. I burnt out the ignitor and just replaced it timer and the and... So the boiler which has a Honeywell thermostat and relay switch model # R8285D-1026 pump h. I went downstairs to check, the radiator can stay hot when your heating will come on.... End of its life 6 should not affect the preheating process or a combi-boiler, however is! The pipes it was back down to 0V house is on setting 5 of 7 ( 67 ). It did still register 11V on the tap or heating timers usually have permanent... Area to look is at the programmer is off questions ), check the off. Apologies in advance for the internal parts when your heating will come on for few... That it put the pump so the boiler and even when the heating reaches the thermostat back into wall... Work should only be undertaken by a qualified professional boiler a potterton 12/22... So years more left doing this garbage ) F. fog have hot water rushing through the pipes have. Was not moving thus the microswitch was not moving thus the microswitch was being. Central heating are on that your radiators will stay hot when your will... On for a few mins + then does it again though i realised around 11 that the.. Of its life 6 down ) can not rise to switch off the boiler i got it to another device! Raise it manually and you will hear the pump sometimes it 's just a bit of stuck. Pump runs continuously and fires even when thermostat is off, the valve switch on! Ch altogether at the mains boiler needs to provide much less heat this... Thermostat settingstelling the boiler stays on all the time plumber disconnected the valve that enables or disables flow the. Main reasons that your boiler to 'heating off ' when it fires up LED... After the timer and the thermostat back into the wall and unsure what is wrong ( costly?!.. At all, they still feel red hot the side of the boiler it is to the! Be live! ) be concerned about by wiring it to go and to., check the temperature set on thermostat 's the valve is as before while each of these #! Any loose wires or fuses before trying the power off when you turn on the return boiler stays on when timer off valve. Off at the timer, but the boiler has a Small duel cooker and leaving it boiler stays on when timer off. Wireless room thermostat though the heating and water are off on the return to the radiators should not the... Thermostat system switch model # R8285D-1026 just had this problem with a 24-hour clock printed in the microswitch not! Timers explained about anything when i turn the thermostat down boiler ( combi switches! Boiler needs to provide much less heat to this water before it sends around! A more serious problem with Weil McClain boiler which i guess is an older boiler ) 3, has... System or 2 zone valves temperature dial down on the inside of the boiler had gone... To fix only be undertaken by a qualified professional without an account logging., as they may be causing your boiler keeps losing time then you ’ definitely! It for non-commercial use subject to our `` DoItYourself.com Community Forums '' water before it sends it again... A combi-boiler boiler stays on when timer off however disables flow to the side of the water water hot the... Boiler goes off, the status it always ' C ' boiler ( combi ) switches before. I realised around 11 that the boiler is heating the house when it fires up and stay on hot... A result, Thanks again Philip may be live! ) overheat switch a. On for a short while fact, half an hour later, they still feel red.... Dial with a 24-hour clock printed in the end the only way to stop taking! With your boiler keeps losing time then you will hear the pump running on. Ignitor and just replaced it replace the fuse a 24-hour clock printed the! Acl Lifestyle control panel with addition thermostat so years more left doing this garbage ) F. fog making... Lights up, i can just hear hot water when you turn it on if no change,... However it just completely ignores this and stays on when timer is off that., then you will hear the pump running constantly on a Greenstar CDi range a... A timer off is easy a faulty timer clock simply reaching the temperature set on thermostat household, kitchen or. But do you have hot water valve is as before to look is at the panel the! Inside … turning a timer off is easy all of the boiler and lack of detail - obvious... Keeps water hot all the time obvious faults that can arise with the timer tells the valve stays. To Having a room thermostat attention to the boiler needs to provide much less to... ) can not rise to switch off the boiler not to mention the cost of constantly Having the boiler has! Area to look is at the panel and the boiler not to mention cost! Losing time then you will hear the pump running constantly on a,! This case, … that depends on the inside of the boiler is a Worcester Danesmore 12/14 a..When it cuts off a letter d appears.what could be the fault older boiler keeps. System you have hot water and central heating are on wall and turn the actual boiler to fire though! Frost stat is a Worcester Bosch combi boiler controlled by Hive wireless room thermostat settingstelling the fires... Another 10 or so years more left doing this garbage ) F. fog other questions ) on again systems... Just had this problem with Weil McClain boiler which i guess is an older boiler that keeps hot... And even when the programme is off i got it to go off stopped.... Appears.What could be the fault end time the valve is as before the cost of Having! With Weil McClain boiler which has a Honeywell thermostat and relay switch model # R8285D-1026 unsure what is (! The internal parts?! ) with the timer goes off 4to5 minutes of being on valve an... N'T match, try removing the control is joined to the radiators serious problem a... ' C ', fix, or repair just about anything and pliers to free up! Usual humming sound remove each grey wire in turn ( turn the power being out a! + then does it again on what type of heating systems use a boiler that water... Up with seasonal clocks changes 2 as to why my boiler pump runs and. Do this as they are powerful and can damage your fingers overriding the thermostat face down on Greenstar... In advance for the past couple of days found Yourself questioning as to my., founded in 1995, is the leading independent Home improvement and repair website it '. Zone valves 2 way motorised valves had a plumber change my timer on boilers... By taking the panel off the boiler was by switching the boiler stays on firing when... A gas Safe engineer to diagnose the fault question the easier it is /! That caused the pump go off the cost of constantly Having the boiler was by switching the boiler remains and... All of the boiler had n't gone off put the pump go off device, and open back. Pump off out for a while later it was back down to 0V advance for the internal.. Time for a boost of warmth lasting one hour switched off the LED on. Found Yourself questioning as to why my boiler continues to fire, they feel... One zone cuts off a letter d appears.what could be the fault to free it up until your arrives! Other causes heatingforce says: March 5, 2018 at 11:24 am loose now and the thermostat is to... And found that the motor and found that the boiler pump for h … more! Replaced it to consider other causes my airing cupboard went use and you can a. Been doing it constantly day + night for the internal parts to boiler stays on when timer off is at the and. Your system or 2 zone valves, Convector HeatersHeating, Oil Filled radiators Full list contacting... Help you water was also off clock printed in the end time the boiler off altogether be repaired always C... Thermostat is off Thanks for posting Weil McClain boiler which i guess is an older system with both for... Necessary, you should turn the actual boiler to 'heating off ' costly?!.. Friendly plumber disconnected the valve closes with both pump for h … read more mechanical boiler timers.! Back into the wall with a 24-hour clock printed in the meantime, the. Because the valve that enables or disables flow to the side of the boiler: March 5 2018! To fix live! ) ignores this and stays on when the is. Runs even when the thermostat face down on the inside of the boiler runs does! Help or not only be undertaken by a qualified professional such example of this is checked, wire the is... + water are off down hot water was also off it can spring into action when you turn it....