Sep 7, 2007 #1 Over the last few days our central heating boiler has been acting very strangely indeed. So like the title said, my boiler keeps turning on and off. Im sure my thermostat is OK since I tried with 2 different ones. Could that be where the problem is but I don't understand why a stuck boiler thermostsat would fire a boiler when controller is off. Original Poster. Alternatively, contact a Gas Safe registered engineer. Check your system’s pressure gauge and repressurise the boiler if it is set below 1. We had a short power cut in our street on Fri … What are combi boilers? A wiring issue could also be the cause for your boiler not turning off. Radiators cold downstairs and room stat 20C set 21.5C. Turn off the cold supply into the boiler there is an on/off valve on the cold in at the top of the boiler. Maintaining a good flame in a boiler is the key to a good boiler performance. on on on off on on on off.. pressure seems fine, 1.5 to 1.8 bar is ok With that boiler, the main heat exchanger surrounds the combustion chamber, so can't be easily removed to flush it. I did this with the boiler on and off, same result. Hence it has become a practice of all boiler designers to interlock purging the boiler with boiler start-up. Fault 4: Boiler not firing/Going into lock-out. off off off on off off off on.. or is the light mainly on, then goes out briefly? It just keeps trying to cycle, sometimes igniting for approx. Baxi boiler keeps firing up and going off every 3 seconds? It fires up, stays on for a few mins, goes off for a few mins + then does it again. I know that the cylinder in the airing cupboard is very warm when the boiler is firing and cools down when I turn the boiler off. Hi. As is the case with most appliances, tampering with wires can be dangerous. ), then the boiler cuts off and keeps re-starting. After a few minutes of being on continually, it keeps firing up and then off again every couple of minutes until the room thermostat stops calling for heat. It is 828E Turbomax Plus. Hi, I hope that some kind soul out there might help me with a Problem with a Worcester 24cdi combi boiler. So, you can set it to switch off at, say, 11 p.m. every night and come on at 7 a.m. every weekday (and 8 a.m. at weekends). Other things it might be and will need a Gas safe engineer to … Reply Prev of 2. Had to turn the power to the boiler off to stop it running. Burnham gas fired boiler starts up, only to shut off after several minutes, flame and circulator. For the vast majority of the time, our boiler is something that we take for granted. But before that you need to know about combi boilers and how they work. Checked the programmer and both heating and hot water were off, the boiler was still running. I have noticed in the last week that, when i put temp up to switch radiators on, or switch the hot water on, the rads or water get hot (mabye 20-30 mins? Combination boiler or combi boilers come being one of the most common types of … Boiler keeps switching itself off; Boiler is not responding to the thermostat; NOTICE: You can still get boiler quotes during the COVID-19 lockdown. Thread starter stevegreen; Start date Sep 7, 2007; stevegreen Well-known Member. Our boiler was doing that when we got an air-lock somewhere in the pipe system so the water was only doing a very short circuit. The radiators are heating up fine and there is hot water, so there is heat going through the system. Any ideas? I read that 180 degrees was like the upper limit, so I was thinking maybe the boiler turns off to let the water cool down. Unstable flame is always a threat for boiler furnace explosion, which can lead to a large outage of boiler and loss. If your boiler is failing to fire up and just going into lock-out, it could be a problem with the PCB (printed circuit board), but you can check this by testing with a vault meter to see if electricity is reaching the PCB whilst still remaining unresponsive. Show More. Restarts after about 10 minutes for about 1 minute then shuts off again. Sometimes all the thermostat valves have turned themselves off because of warm weather and are shut off, so boiler can't move enough water to cool itself so keeps trying. There are many causes that can contribute to boiler flame failure. So the pump is not being powered up for some reason. Hi there, First time posting so hope can be of assistance. ). None of the pipes leaving the boiler are getting hot when it does this. Flicked the power isolation off, held the tester on the pump cables, switched the power back on and the lights lit up on the tester for a split second, then off again. 30 seconds. 4. As long as it keeps on working properly and we have a constant supply of hot water and heat as required, there is little to be done in the way of maintenance, apart from the annual check. The thermeter on it says that the water is hitting around 180 degrees. 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. We have a two level thermostat and that is how ours is designed to work. While this may not seem like a big issue during these warmer months, it is best to fix a boiler that keeps switching itself off before winter arrives so that you can guarantee it stays working when you really need it. I have had a very good friend who is a registered boiler engineer but thought id get some other opinions before shelling out more money. (I suppose that is normal!!! is the light mainly off, then flashes briefly? If you have a remote stat' that this needs resetting or if signal being interfered with, turn off internet hub/router for now. 2 Next Reply Author. It’s an unpleasant, shocking sound, but rest assured that it’s not going to happen: kettling cannot make your boiler explode! We had to turn off every radiator and then turn each one on in turn in order to force the air through into the radiators so we could bleed the system successfully. Boiler breakdown 85 months. Crazy boiler - off on off on ALL THE TIME! Should have 1 rad without a auto thermostat valve so boiler can cool itself by firing up and pumping water through radiator. The above are things you can check yourself, any of the above would stop your boiler from staying on. It’s best to have an engineer come and take a … Hello. boiler keeps turning off and on? Actually, I'm not sure if it actually turns all the way off. Boiler keeps shutting off I have a 140 000 BTU Olsen boiler, it ran fine for the first hour last night then started acting up. The system is controlled by a "Lifestyle 711" timeswitch (standard two timer on /offs per day program))and I have a single thermastat in the hall. Discussion. Boiler firing intermittently - Any Ideas? Well if you have a combi boiler that keeps firing up randomly, then you need to think about it. Even it is the heating floor calling for heat, the boiler will burn gas for about 5 seconds before it gives up. I set the temp at 76 F on the wall thermastat and 180 degrees for the boiler (heard that was the optium temp for efficency). ... the boiler turns off, the water cools down to say 60 and the boiler starts again to repeats the cycle without any useful heat ever having been taken out. Issues with your boiler’s wiring. There are many reasons that a boiler switches itself off, but here are just some of the common causes. The boiler thermostat didnt stop the boiler when it was reduced until is was all the way to minimum. After turning it on, the boiler start to run under the same pattern: on and off every 30 seconds or so. Mend - boiler, keeps, turning, off: Answers will appear here when the question above is answered. 7 posts. There is an eco setting for something, but this isn't on. I have a combi boiler + it keeps firing up when the heating + water are off. But a while later it turned the boiler off when turned down from 4 -3. We've had the boiler running for three showers and general washing and haven't had a problem with that. If the boiler’s thermostat is faulty, it will allow the burners to stay on longer than it should, causing the heat exchanger to overheat. Make sure all the rad valves are open. The needle on the gauge optimally should be located between 1 - 1.5 bar when the boiler is in an off position and has cooled down to room temperature. My boiler keeps firing up even though the timer for hot water and central heating is switched to Off. And when water comes into contact with the super hot heat exchanger, steam bubbles are created, which then erupt noisily. ravenheatcsi85 boiler heating keeps firing up and then turning off but hot water is ok david goodwin April 2009: There is more help available. This will just prove if there is a possibility of a leak somewhere that you cant see, if it stops you have a leak somewhere if not will go to the next stage. If the boiler system pressure is lower than 1 bar your system should be re-pressurized, it can be done by following the steps below: 1.Find connections of the filling valve under the boiler 2. Water temperature on boiler is set too high. We therefore always recommend you contact a Gas Safe engineer to deal with the problem. It came back with a status code of S.31 and that is it. ponymath. In more serious cases, big air bubbles start to pop and create such loud banging noises that it can feel like the boiler is going to fall off the wall. My central heating comprises a Baxi Duo-Tec Combi HE with a Honeywell Evohome Controller (latest Wifi version), wireless relay box (BDR91) and 6 Radiator Controllers (HR92). The high is 20C the low is 15C and the heating control on the boiler is left on 24/7 in the winter. Friday 8th November 2013. Repeats process but never gets water to temperature. All modern boilers come with a timer on them, usually on a separate panel that’s wired up to the boiler itself. If the heating on the boiler is set to 'ON', then if the thermostat is turned down to 15C, for example, the heating will still come on if the room temperature falls below 15C. Book a repair Get a quote for a new boiler 10. 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