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Old 04-15-2012, 06:45 PM   #1
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water heater problem

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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Old 04-15-2012, 06:53 PM   #2
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Is the the thermocoupler in adjustment to the pilot flame?
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Old 04-15-2012, 07:31 PM   #3
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The flame is nice and blue.
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Old 04-15-2012, 07:36 PM   #4
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How close is the thermo to the flame?
The most common problems are the pilot flame is adjusted to low or the thermo
is not in the tip of the flame or the wind baffle is missing or the thermo is bad.
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Old 04-15-2012, 08:31 PM   #5
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will try to replace thermocoupler...still don't understand why water was only hot for 20 seconds.
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Old 04-15-2012, 08:48 PM   #6
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Only a small amount of water got warm before the flame went out.
Hope your repairs fixes the problem.
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Old 04-15-2012, 09:20 PM   #7
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bypass valves open??

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??
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Old 04-15-2012, 09:34 PM   #8
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Good point yes the bypass has to be closed and the hot and cold water going to the tank have to be open.
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Old 04-16-2012, 08:12 PM   #9
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problem solved

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!!!
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Old 04-16-2012, 08:57 PM   #10
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Glad to help
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