Discuss Main 24HE constantly cutting out and firing back up on HW and Heating and intermittent flame failure light. in the Central Heating Forum area at PlumbersForums.net

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I am having a problem with my main 24he boiler where the flame is constantly clicking on and off with the heating and when using hot water. Some times the flame failure light comes on but it ignites again after a few seconds. The plumber has changed a couple of sensors on the boiler and checked the filters are not blocked but it is still doing the same thing. When you are in the shower you have to turn the thermostat up further because you can feel the temperature of the water fluctuate but it does not go cold. Anybody any idea what the problem could be?
 
It sounds like your boiler may be experiencing issues with its ignition system or there might be a problem with the gas supply pressure. It's also possible that the heat exchanger is partially blocked, affecting the flame stability and causing temperature fluctuations. Given the complexity, we'd recommend getting a qualified technician to check the gas pressure, inspect the heat exchanger for blockages, and assess the boiler's control board. Plus always remember that regular servicing and cleaning of the boiler's components can prevent such issues. Hope this helps you out a bit - and good luck!
 
It sounds like your boiler may be experiencing issues with its ignition system or there might be a problem with the gas supply pressure. It's also possible that the heat exchanger is partially blocked, affecting the flame stability and causing temperature fluctuations. Given the complexity, we'd recommend getting a qualified technician to check the gas pressure, inspect the heat exchanger for blockages, and assess the boiler's control board. Plus always remember that regular servicing and cleaning of the boiler's components can prevent such issues. Hope this helps you out a bit - and good luck!
The plumber has drained the system and put inhibitor in. Is there anything else that could be the problem?
 
The plumber has drained the system and put inhibitor in. Is there anything else that could be the problem?
Couple of possible things spring to mind: could be a faulty diverter valve, air locks in the system, a malfunctioning thermostat, or even perhaps electrical connections that are not secure. Hard to know for sure without a thorough inspection of course.
 

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