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gas wall heater Answered

The pilot light will not stay lit? i have replaced the "generator " which is what they call it rather then a thermo coupler . wondering if i should pull the gas valve ? I'm not exactly sure on how the generator keeps the pilot gas on? anyone have any ideas?

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iceng
iceng

3 years ago

Some pilot detectors are TC but others are narrow gas tubes that are fragile if bent.

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Vyger
Vyger

3 years ago

A few years ago I had my propane tank upgraded. After it was done I had all kinds of problems with the furnace staying lit. Apparently tiny bits of stuff in the feed line were knocked loose and it caused to pilot light to go out all the time. I finally took the burner unit off and used compressed air to blow it clean. Since then it has worked with no problems. Not necessarily related to your problem but then again it is a possibility.

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Downunder35m
Downunder35m

3 years ago

1. If you have no clue and are not qualified leave the fingers off and call someone with the right qualifications.
Better to be safe now than sorry later ;)
2. The pilot light has to be on when there is a flame and off without the flame.
If you can't make it stay on then either the thermocouple is faulty (or misaligned) or the valve control is faulty.
In either case it should be checked properly and if in doubt be replaced as one unit.
This requires to work on the gas line and in most countries is not legal without the right permit and qualification.

If you still want to fiddle yourself:
Check that the thermocouple is actually sitting in the pilot flame - top half is fine.
Check that you follow the correct start procedure and that actually gas is coming out - if in doubt with a long match or lighter on the pilot light.
Hold the start button in twice as long as stated while making sure the pilot light stays on and the thermocouple really is within the flame.
If it won't stay on you have a fault in the pilot system.
On some models you can replace the thermocouple alone on other only together with the valve control unit.
Even with a new thermocouple there is the chance the problem was the relay or valve control itself, so it is a 50-50 chance.
On a lot of older devices it takes quite some force to keep the start button down and some need the use of two buttons, so make sure to follow the correct procedure for your model.

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steveastrouk
steveastrouk

Answer 3 years ago

...if the TC is dead or dying, you can often find a blister on the outside with your fingers when its cold.

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steveastrouk
steveastrouk

3 years ago

There should be a button you hold in, until the thermocouple gets red hot (which it MUST to work).

Basically, its a sort of relay. The thermocouple, when red hot, can generate enough current to keep a small electromagnet energised, the magnet holds the gas valve open.