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Old 09-28-2013, 07:40 PM   #1
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Dometic Refrigerator cycling on and off

Does anyone know why I can hear my dometic refrigerator cycling on and off constantly.
The refrigerator and freezer are cold . Just worried because you can hear the refrigerator unit clicking on then off. We have not had our camper very long.
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Old 09-28-2013, 07:47 PM   #2
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Idk what you hear, but since it's cold, it doesn't have to cool all the time, but still has to sometimes. So it starts heating up when it calls for cooling, and shuts off once cool.
What is "constantly?"
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Old 09-28-2013, 07:56 PM   #3
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About every three minutes or so
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Old 09-28-2013, 08:11 PM   #4
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Well someone would need to test what is actually cycling and what refr this actually is. Dometic does make a residential style refr I believe.
Someone needs to find actual temps in the freezer and refr box as well.
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Old 09-28-2013, 08:14 PM   #5
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Thank you so much for your help. Ours is not a residential. We are going to put a thermometer in the bos and test the temp but it is very cold
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Old 09-28-2013, 08:17 PM   #6
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I would need to know what is cycling, but if it's calling for cooling, then not within minutes, either the thermister is bad or the board is.
Low 12V power causes funny things. Low AC volts causes issues with voltage drops.
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Old 10-05-2013, 11:02 AM   #7
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I'm new to this site, but have been RVing for 20 years. I do all my own maintenance as I am an ASE certified mechanic and a licensed general contractor.

If you have a unit with a fan, you are probably hearing the fan switch on and off. The cooling unit is almost silent except for a small burbling noise from the boiler.

I had the same problem with my Dometic 2652 and determined that the thermodisc switch was located incorrectly. It was directly in the flow of the fan and when the fan kicked on it cooled the thermodisc and shut the fan off in a couple of minutes!

On-off-on-off... It drove me crazy.

It's an easy fix, but you have to pull the refer. Move the thermodisc all the way to the right (facing the back of the refer) to the bend as the tubing goes from vertical to horizontal. This is the hotter part of the tubing as it is before the cooling fins. It's just a snap on switch, so pull it off and snap it in the new location.

It takes about 30 to 45 minutes to pull, move and reinstall. Don't forget to soap test the gas line after reconnection.
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