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- 5 Mar 2005
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Hi - I have one of these and its always packed in each year or so for a pilot light thermocouple failure. Replace it and it works fine again for another year or so!
This time....its off and on ...works a few days ...then not. Mostly pilot light is still on, gas valve solenoid works fine (the sound of it kicking in) ...but no gas flow. Sometimes, with the gas valve solenoid on and pilot light is on, if I push in the pilot light gas button a few times..the boiler lights - no sound of gas valve kicking in as it is already energised, it seems the thermocouple part of the gas valve circuit is stopping the gas getting through.
I've tried turing off and on repeatedly the gas valve (via boiler hi/off/lo switch). I hear gas valve kicking in and out - no problem.
The pilot light in almost all cases is on, the main gas valve is on, but still no gas flow.
Sometimes when I push in the pilot light gas button the pilot light goes out. Normal sequence to light it again.
So...I think the gas valve part is fine. The problem seems to be to do with the electrical part of the circuit that is linked to the pilot light...i.e. the thermocouple circuit.
I do not really want to replace gas valve (unless its cheap - parts plus labour) as I wish to replace boiler in a year or so.
I have presumed that if any of the overtemp stat's were breaking the circuit they would stop the gas solenoid from kicking in and if it was the stat in series with the thermocouple - then then pilot light would go out.
Therefore - can anyone offer any advice on how to fix this.
Thanks for any help.
Kind Regards
This time....its off and on ...works a few days ...then not. Mostly pilot light is still on, gas valve solenoid works fine (the sound of it kicking in) ...but no gas flow. Sometimes, with the gas valve solenoid on and pilot light is on, if I push in the pilot light gas button a few times..the boiler lights - no sound of gas valve kicking in as it is already energised, it seems the thermocouple part of the gas valve circuit is stopping the gas getting through.
I've tried turing off and on repeatedly the gas valve (via boiler hi/off/lo switch). I hear gas valve kicking in and out - no problem.
The pilot light in almost all cases is on, the main gas valve is on, but still no gas flow.
Sometimes when I push in the pilot light gas button the pilot light goes out. Normal sequence to light it again.
So...I think the gas valve part is fine. The problem seems to be to do with the electrical part of the circuit that is linked to the pilot light...i.e. the thermocouple circuit.
I do not really want to replace gas valve (unless its cheap - parts plus labour) as I wish to replace boiler in a year or so.
I have presumed that if any of the overtemp stat's were breaking the circuit they would stop the gas solenoid from kicking in and if it was the stat in series with the thermocouple - then then pilot light would go out.
Therefore - can anyone offer any advice on how to fix this.
Thanks for any help.
Kind Regards