Dometic/Atwood RV Water Heater Thermostat Replacement (Too Hot OR Cold & Fault Light)

In this video, I describe the symptoms of a faulty thermostat in Dometic/Atwood RV water heater, as well as how to replace the thermostat. I also discuss what may be a root cause leading to repeated thermostat failure, so that the problem doesn't recur.
Thermostat Replacement Kit (Atwood/Dometic 91447 93866):
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[@user-ju9mx2ik2k]

Hey great video! Thanks for pointing out the root cause as well.

[@BOOTENWAGEN]

Thank you!

[@oscarcanelo6262]

Absolutely outstanding video! I’m blown away way, all he excellent explanation.Cheers! From 🇺🇸

[@BOOTENWAGEN]

I really appreciate the kind feedback, thank you!

[@user-ln1uy2ti2v]

Thanks for the install video. I had diagnosed my two-year-old heater to the T-stat/ECO It was shutting off early giving only lukewarm water. Parts came in today so hoping that this fixes the problem.

[@BOOTENWAGEN]

Sure thing! Did you try fixing it yet? How did it work out?

[@branmichaluk445]

Best video I've seen on this topic. Thank you.

[@BOOTENWAGEN]

I appreciate it, thank you!

[@terrythorsen6282]

Exactly my problem! Thank you

[@BOOTENWAGEN]

You're welcome!

[@yuma5745]

Thanks, this did help, best one I watched. Very helpful. Alan

[@BOOTENWAGEN]

Great, I'm glad!

[@josehonoripereirafilho1431]

Excellent video! Great explanation!

[@BOOTENWAGEN]

Thank you!

[@TodaysTask]

Excellent video thank you.

[@jcobra09]

Good video. Thanks for the help. Is that your real voice or a rye to talk thing? 😂

[@BOOTENWAGEN]

Thanks you. It's my real voice. Out of curiosity, what's giving you the impression that it isn't a real voice?

[@mcgilm69]

With that leak in the blowoff valve, I'm surprised you didn't have your water pump cycling on/off; unless of course you are on city water, then the pump wouldn't be running.

[@BOOTENWAGEN]

That would've been a good indicator actually, but yes - I'm usually on city water.

[@sercanyigit489]

Hi! I have the same exact heater but the gas doesn't shut off and you could get serious burn with that heat. Are these supposed to shut themselves off or you have to turn the heater on and off only when you need it?

[@BOOTENWAGEN]

If it's like mine, yeah it should shut off when 140F is reached, regardless whether you're using gas, electric, or both.

[@evenstargalaxy9586]

I am getting no heating on electric, and no gas/ignition click on gas. It has been suggested it is a thermostat? Could this be it, can I check the thermostats?

[@BOOTENWAGEN]

It's possible - I assume you don't have a fault light on. Here's my best guess for your situation (if I understand how it works correctly): if your thermostat failed and got stuck in the 'open' position, it would be telling your control board that the water is 'always hot', so no need to turn the heating element on. That would also disable the gas ignition. You can test my theory by unplugging the two wires leading to T'STAT and touching them together (not just momentary, but let them continue to touch each other). If the heater turns on, that's a bingo, and you need to replace the thermostat.

[@evenstargalaxy9586]

@@BOOTENWAGEN thank you. It was the fusible link corroded at one connection. Once I cleaned it up and blogged it in both systems started up.

[@BOOTENWAGEN]

@@evenstargalaxy9586 Excellent! That's even better. Glad to hear you're back in business.