Dometic Refer Too Colg
Dometic model RM2862RD This unit was installed 2006 in a "new to me" 1999 Winnebago Chieftain. I've had it on shore power for the last week while I move in and repair a few issues, It's too...
Forum Discussion
As Sandia Man indicates the problem could be a bad thermistor. Higher than normal resistance will call for more cooling. You can check to it to see if it does need replacement:
Turn off all power to the refrigerator.
Remove the cover from the control box on the rear of the refrigerator.
Locate the thermistor wire. It will be exiting the inside of the unit in the upper left corner and attaches to the control board in the upper left quadrant. There will be a 4-wire connector on the control board just above the two wire thermistor connector.
Detach the thermistor wire connector from the control board.
Inside the refrigerator, detach the thermistor from the cooling fins and dip it into a glass of ice water (a glass full of ice cubes with just enough water to cover them). Leave the thermistor sensor in the ice water for about two minutes.
At the other end of the thermistor (at the control board in the rear) measure the resistance between the two wires in the thermistor cable. It should read between 7,000 and 10,000 ohms if the thermistor is good. Any higher resistance indicates a bad thermistor (according to Dometic), although higher resistance will call for more cooling. Low resistance will cause the unit to not cool properly; high resistance will cause it to overcool.
Turn off all power to the refrigerator.
Remove the cover from the control box on the rear of the refrigerator.
Locate the thermistor wire. It will be exiting the inside of the unit in the upper left corner and attaches to the control board in the upper left quadrant. There will be a 4-wire connector on the control board just above the two wire thermistor connector.
Detach the thermistor wire connector from the control board.
Inside the refrigerator, detach the thermistor from the cooling fins and dip it into a glass of ice water (a glass full of ice cubes with just enough water to cover them). Leave the thermistor sensor in the ice water for about two minutes.
At the other end of the thermistor (at the control board in the rear) measure the resistance between the two wires in the thermistor cable. It should read between 7,000 and 10,000 ohms if the thermistor is good. Any higher resistance indicates a bad thermistor (according to Dometic), although higher resistance will call for more cooling. Low resistance will cause the unit to not cool properly; high resistance will cause it to overcool.
