have a 6 gal propane suburban water heater....have hard time keeping pilot lit, pilot goes out after temp is reached. turned up temp to max once again pilot goes out but literally got about 20 seconds of hot water. Ive already cleaned out pilot tube and thermocoupler. so is thermocoupler bad or gas valve?? valve is almost as much as new unit...
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my thermocoupler may be bad but I had unit going for over a 1/2 hr...I have a quarter turn shut-off valve at the cold and hot ports of the water heater with a line connecting them...I'm assuming this is a bypass..should both valve be closed or just one? may explain why I only had hot water for 20 seconds...backfeeding to the cold side??
bent deflector so flame hit thermo. better...problem solved. Found cold inlet has 2 quarter turn valves...both were almost closed...had the bypass valve open yesterday...no wonder I wasnt getting hot water. Thanks for all your help. now onto the brakes!!!