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 > Problem with electric side of water heater

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bob213

Fresno, CA

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Posted: 07/11/18 07:57pm Link  |  Quote  |  Print  |  Notify Moderator

Suburban swde6
I used search and here is what I have done and found.
Both thermostats are fine.
I have power at circuit breaker-made sure all wires were tight while there.
Element has continuity with wires removed.
No power at wires on element.
Checked switch..it was good but replaced anyways.
No power at wires behind switch.
Where to now?
Any suggestions?


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pianotuna

Regina, SK, Canada

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Posted: 07/11/18 08:08pm Link  |  Quote  |  Print  |  Notify Moderator

On mine there was a relay. During the course of disassembly the relay started working again. The switch inside the RV was, on mine, 12 volt.

It took 90 minutes--and I did replace the element since that is what I thought had gone bad. They sure as heck did not make it easy to be serviced.


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donn0128

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Posted: 07/11/18 08:15pm Link  |  Quote  |  Print  |  Notify Moderator

Suburban 120VAC wiring is really simple. Receptwcle to switch to limit switch pack to heating element. If you have no power at the switch, then its likely you either have no power at the receptacle or the wires are burned at the junction box on the top left middle of the water heater.


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bob213

Fresno, CA

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Posted: 07/11/18 08:17pm Link  |  Quote  |  Print  |  Notify Moderator

No inside switch on mine. I think I was checking for 120 at the switch incorrectly. I was touching both wires and I think I should touch one and ground the other. Thermostat shows a hot spot but is still intact.

donn0128

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Posted: 07/11/18 08:21pm Link  |  Quote  |  Print  |  Notify Moderator

The little off on switch down in the lower left corner are prone to failure.

donn0128

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Posted: 07/11/18 08:22pm Link  |  Quote  |  Print  |  Notify Moderator

The little off on switch down in the lower left corner are prone to failure.

Old-Biscuit

Verde Valley

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Posted: 07/11/18 08:23pm Link  |  Quote  |  Print  |  Notify Moderator

As suggested.....wiring in AC Junction Box.
Access it from backside of WH Tank

120V AC goes from Circuit Breaker to AC Junction Box where wire nuts are used.
To On/Off Switch
Then to High Temp T-stat down connecting wire to Normal Temp T-stat
Then to Element


[image]


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rvsatek

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Posted: 07/11/18 08:24pm Link  |  Quote  |  Print  |  Notify Moderator

Start with checking for power at Romex into water heater . Inside on left as facing wh from outside. If good, then problem is burnt wire between t-stat and switch or between switch and element.


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Old-Biscuit

Verde Valley

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Posted: 07/11/18 08:27pm Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

On mine there was a relay. During the course of disassembly the relay started working again. The switch inside the RV was, on mine, 12 volt.

It took 90 minutes--and I did replace the element since that is what I thought had gone bad. They sure as heck did not make it easy to be serviced.


That sounds like an Atwood water heater.DC Relay and element on backside of tank
Suburban has a similar model...."DEL"....uses DC Relay but element is easy to access in outside compartment


OP has a "DE" model....direct 120V AC to element

bob213

Fresno, CA

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Posted: 07/11/18 09:06pm Link  |  Quote  |  Print  |  Notify Moderator

I rechecked the outside switch the correct way by grounding to water heater and I do have power. From there I have no power to black wire at element. From the diagram above I would have to assume that my t'stat is bad even though it is not burned thru. Should I replace that next?

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