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mondmn70's avatar
mondmn70
Explorer
Dec 18, 2014

Intermittent Problem with Fridge

I have a Dometic (RML 8555) gas/12V/120V fridge that occasionally stops working on gas or 120V (not sure about 12V since seldom us it). It only happens a few times a year and can happen at anytime - either stationary or traveling. The fridge has an automatic setting which uses gas for travel and 120V when plugged in. I have taken it in for service since it is still in warranty (few more months) but of course it cannot be duplicated.

The symptoms are that the temperature will start to rise while either stationary or traveling. When on gas, the flame is still burning but just does not sound as if it is burning at as high a rate as when the fridge is operating properly. When on 120V all the other 120V equipment continues to work normally. So it seems that the fridge is just not calling for cooling when it should be. Switching between gas and 120V (when connected) will usually fix the problem after an hour or so but can take longer on occasion. When this first started, the fridge beeped when the temperature started to increase but has not done this in the most recent episodes.

Any suggestions on a circuit board or sensor that could causes this to occur with both gas and 120V that would be easy to change and maybe fix the problem?

Thanks for your help.

Mike

12 Replies

  • I keep a volt meter on the 12V system and it always showed between 12.3 and 12.7 volts during the episodes when the fridge was not cooling. The fridge would stop working but then resume working within an hour or so without any change in the 12 volt system.
  • Check your converter and coach batteries first. The fridge needs good constant 12 volt for the thermostat to work irregardless of what mode you are using.

    My fridge would come on and you think it was working but then later on it would not cool.

    What happens is the fridge reaches the temp set and shuts off like it should. Only thing is if there is a 12volt problem the thermostat won't work and the fridge can't come back on. Fools a lot of dealership repair shops. Doesn't get past a good mobile RV repair guy though.

    Mine was low 12 volt from bad converter that actually was boiling my batteries. Henceforth my AC and fridge would come on but couldn't come 'back on' when the thermostat called for it. Dealership just wanted to replace both.:S Mobile Repair guy said otherwise.

    Was a big learning experience for me how things work in an RV and how to always call a Mobile RV repair man! :B