Originally Posted by skipper194242
i am not sure why yet but 120 volts does not get on elements untill i switch gas switch on. the switch inside for electric heat will not do it by itself. it is a suburban model sw10de serial #021802393. the electric elements get water hot. but the wiring diagram above makes it seem off.
Here is the manual for your heater. The only way that the AC element can heat the water is if the 120VAC circuit breaker in the power center is on and the black switch outside under the metal cover in on.
The switch inside has nothing to do with the AC water heater system.
So, Let me understand what you are trying to say:
1) The AC circuit breaker - ON
2) The back switch outside - ON
3) Inside switch with light - OFF
PRESS BOTH RUBBER circled in the center.
If one goes in and pops right out you have a shorted element and it needs to be replaced.
If one goes in and stays, the hot water has gotten hotter than 120 degrees and popped to avoid scalding.
If both were IN then do this:
Is there 120 Volts AC at the element? (you will need to remove the rubber cover over the high limit switch and the plastic cover over the heating element.
Using a volt meter set for 250 volts place one probe on the high limit switch terminal or (one leg of the element) and the other one to the metal case. It should read approximately 120 volts.
If it does not you have a wiring problem to the heater.
If there is, the element or AC high limit switch is bad.
When you turn on the switch inside the camper you BYPASS the AC element and turn on the propane to heat the water. The water will get hot because of the propane and not the 120VAC.
If none of this makes sense (or more than you want to deal with) you may just need to call the service man.