Originally Posted by Hippo
Can anyone tell me how to trouble shoot the 110 cooling unit in my trailers fridge? 1975 Tradewind 25 foot. The propane side works very well. I replaced the toggle switch at the control vavle but that did not make any difference.
The two parts most likely to fail are the heating element and the thermostat. The switch that turns it to AC is another possibility, but less likely to fail. The electric thermostat is physically separate from the gas thermostat, but is usually on the same shaft with a single knob adjusting both thermostats.
I would unplug the refrigerator , remove the shroud from the boiler, pull off the wires from the heating element, and meter the element with an ohm meter. It should not read open; if it does, you need a new element.
If not the element, then carefully, attach a voltmeter on the wires leading to the element, plug in the refrigerator, turn it on, and see if you have 110v going to the element. If no voltage, the thermostat is the most likely failure. Possibly the switch may have failed. Someone with a little electrical savvy may be able to poke around and find out what is wrong.
Be careful when poking around with power on!