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Dometic fridge (2 years old) works only on gas for a couple of months Serge 2-27-17  
Hello all.,

I have a DM2852RBX (dometic brand) for a couple of years and it started acting about two years ago by cooling with LP only. It is a two way fridge that works on AC and LP only. I took the manual and tested all the components. The heating AC component reads 44 ohms which is spot on, the board is under voltage and receives the adequate DC and AC. Both fuses are good. When I remove the thermistor to test the board the fridge still works on LP only. I cannot get it to switch to AC. The AC heating element does not get any current/voltage.

Based on my testings, I ordered a refurbished board from Amazon (Dometic (3316348.900)) but after installation, the fridge still switches to LP (although it is on AUTO).

So, I suspect my heating element although the resistance tests correctly. Any idea before I order a new heating element? The reason I am doing all the diagnostics myself (the unit still under warranty) is that the cost of a visit by a specialist is more than just replace the parts (if I had an ammonia leak, that would be different).

Thanks for helping.

Serge
Re: Dometic fridge (2 years old) works only on gas for a couple of months Keith 2-27-17  
Hi Serge, you state that the board is getting adequate AC, so the receptacle/plug has AC to it. If the AC spades on the board going directly to the heating element have AC, then I'd say from here, the element is bad. If not, the board is bad or a bad fuse.

You can try disconnecting and direct wiring the two leads to the element to an old lamp cord or cut off extension cord and plug it in and see if it gets hot.

Good luck
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