Question about Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: Brivis Wombat ducted heater:
This is most likely the thermocouple. Before you come to the conclusion you have to change it... make sure the mating area at the gas valve is clean. Disconnect the thermocouple mounting nut and clean both the end of the thermoouple and the area where the thermocouple is mated to the gas valve. Additionally make sure the flame passes over at least 1/4 inch or more of the thermocouple probe end. Reposition as necessary to make it rest in the flame. If you have to bend it... do so very slowly and carefully. It is better to bend the bracket vs the thermocuple if possible.
The would be rare but it is possible that you have a very good vent / flue for your heater and the wind is creating a venturi effect that causes too much flue air flow. Maybe 2 times in 40 years I have seen this. It took some careful modifications to the flue cap on the roof by riveting some extra metal pieces on to the cap. (trial and error for over an hour!!!) I seriously doubt this is your problem.
You either have a dirty thermocouple
Dirty thermocouple mating area
Inproperly positioned thermocouple
or.... of course the thermocouple is just slowly failing.
I do NOT think you have a gas valve problem at all.
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Posted on Jul 03, 2011
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