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Old 08-07-2021, 07:15 PM   #1
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Brand: Thor Motor Coach
Model: Freedom Traveler
State: Kansas
Posts: 9
THOR #19033
Atwood Hot Water Heater

What causes hot water heater Fault light to light?

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Old 08-07-2021, 07:39 PM   #2
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Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 7,156
THOR #7035
Originally Posted by Inspector57 View Post
What causes hot water heater Fault light to light?
Well, if you already have HOT water you don't need a HOT WATER HEATER.

But seriously, that light tells you the water heater failed to light and is not heating the water after several attempts to light. It will not try anymore until you turn it off and then back on to recycle the controller.
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad
2020 Chevy Colorado Z71 Trail Runner Alternate Toad
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Old 08-07-2021, 11:24 PM   #3
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Model: Newmar Bay Star Sport 300
State: Alabama
Posts: 4,143
THOR #6826
To amplify a bit….when you try to use the heater on propane the controller goes through a start sequence. It turns on the gas flow and the last step is “sparking” the igniter. You should be able to hear it spark rapidly. If it fails to light the controller will shut it down and turn on the light so that you’ll know it failed. As mentioned you can turn the switch off and back on to restart the process. It’s not unusual to have to do that two or three times if you haven’t used the coach for a while. Usually it just means there is/was air in the line that has to be flushed out. Many experienced RVers will light the stove first to ensure there is good gas flow.
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