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Old 09-01-2016, 09:12 PM   #1
Wildland Firefighter
Join Date: Jul 2013
Location: California
Posts: 70
All freezer, No fridge

We have an 09 357QS with a Dometic RM3962 fridge. On our last trip our fridge decided to stop cooling. All warm inside with some spoiled food and warm drinks. What I don't understand is when I opened the freezer door, it was very cold and things were just right. Still frozen. It stayed that way for almost 2 days and then the unit turned off completely. Ran on gas while we're driving, and then 50 amp plug in every night. Never a problem before. Always very cold.
We went by a CW and spoke to a service rep. His reply was that we had frozen crystals in the "coils" so the coils would need to be replaced. Or since that would be sooo expensive we should just buy a new Dometic fridge altogether. Well, I really don't have 2 grand to play with right now.
As of now, It does get power, I can click threw all the settings, I can hear the poof of the gas lighting and the click of it switching over to AC. But when left on it's own to cool, It does eventually shut down completely like I turned it off. Never being a long enough of a time for the fridge to actually get cool. The freezer does get cold, but not quite to freezing.
If someone has any ideas, I'm all ears.

Gordon and Dawn is offline   Reply With Quote
Old 09-02-2016, 11:55 AM   #2
Head Rambler
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 3,599
Unfortunately his explanation is probably correct.

There is a procedure where you take the fridge out and turn it upside down and shake it a few times to loosen the crystals so that they can flow back to the absorber vessel.

I've heard to let it sit upside down for a few hours and I've also heard that if it hasn't worked in a few seconds, it's not going to.

It's a little work, but if it revives the fridge, it's well worth the time and if it doesn't you haven't lost anything because you were going to have to remove it anyway.

If it doesn't work, they sell rebuilt cooling units for them, and you may want to check that out.

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Gotta go campin!
Bama Rambler is offline   Reply With Quote
Old 09-20-2016, 02:20 AM   #3
Wildland Firefighter
Join Date: Jul 2013
Location: California
Posts: 70

I talked to a very qualified RV mechanic and he confirmed the bad news. I tried a couple easy fixes and neither worked. ( banging on the tubing, and checking all the electrical connections and the board fuse). So I went with the rebuilt cooling unit that are gone through by the Amish. Much more affordable at $475 plus shipping. I watched a few videos on swapping it out. Seem do-able. I just got done taking the fridge out today. Very simple. A bit bulky. 2 people are better than 1. It only took about 45 minutes including tool finding. It's on the sofa waiting for me to swap it out tomorrow. I'll keep you all posted.
Gordon and Dawn is offline   Reply With Quote


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