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When operating on Electric, if the rear of the cooling coils get warm and the fridge is level, but the refrigerator does not get cold then it is more then likely your cooling unit that has failed. Visit ArctiCold Refrigeration We keep it cold for info on replacement cooling units.... I have also attached a video with tips on diagnosing the RV fridge,
Arcticold New replacement cooling units can be purchased from Ebay
Dometic RM760 Brand New Manufactured Cooling Units LIFETIME WARRANTY
You need to unplug the heating element from the circuit board and using a digital multi meter check the ohms. You should read approximately 44 ohms +/- 10%. If it is out of range change the heating element.
I found that they rewired the 12 volt supply, red wire, thru a heat safety switch on the burner unit and it was open instead of being closed and cut off the main 12 volt supply to the control board. I connected a jumper wire around the new switch and the frig works . either the new switch is bad or too close to the heating unit.
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