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Old 09-18-2016, 04:49 PM   #1
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Atwood water heater failure

Our 2016 Jayflight 27BHS had a water heater failure to light on it's third trip out. It would not light on gas or electric. Fortunately I found a You Tube video on it and was able to get it going. There is a thermocouple that from what the guy in the video says goes bad all the time. I don;t know about that but when i removed it and plugged the brown wire back down the water heater started up.

It is located on the double brown wire that is plugged into the T-Stat connection.

Anyone have any info on why we need a thermocouple ??? My 2002 TT did not have this device and worked for years fine without it...

Thanks !
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Old 09-18-2016, 05:03 PM   #2
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Well it is for safety on propane and gas water heaters
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Old 09-18-2016, 05:04 PM   #3
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The thermocouple is REQUIRED. Its function is to keep the gas valve open when there is a flame present. If the flame is not there when it should be the thermocouple cools and allows the gas valve to close.

It is NOT involved when operating on electric. However, the thermostat IS. It sounds like, from your description, a wire had come off the thermostat. That WOULD prevent both gas or electric from working.
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Old 09-18-2016, 05:14 PM   #4
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but are you sure its not electronic ignition
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Old 09-18-2016, 05:20 PM   #5
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Quote:
Originally Posted by Paintinfool3 View Post
but are you sure its not electronic ignition
It IS electronic ignition. All gas/electric models are electronic ignition. The thermocouple still controls the gas valve via the electronic control module.
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Old 09-19-2016, 07:24 AM   #6
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Sorry for the confusion... I said thermocouple and what i meant to say is Thermal Cutoff device, it is a diode. I can buy 2 of them on Amazon for $16.50... It is intended to cut off power to the T-Stat if the temp rises over 190 degrees to prevent fire. Looks like from what i have read it is a fairly common failure point... Don't know, but i ordered 2 of them and we'll see what happens....
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