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Travelin2's avatar
Travelin2
Explorer
Jan 22, 2019

Dometic RM2652 not cooling

We bought a 2002 Bigfoot trailer recently and I knew the fridge may be questionable because the rig sat for a long time without any operation of the appliances. The fridge cools a bit when running on 120AC but when on gas it does nothing. The gas burner lights and runs very nicely with a clean blue flame. It relights immediately when I blow it out and the flue is hot with lots of heat escaping out the top of the tube with the baffle in it. I unplugged the thermistor at the circuit board and ran it on gas for about 3 hours. At the end of that time the coils and the big canister at the bottom of the coils was just ambient temperature. I have wireless temp sensors inside the freezer and fridge and no temperature change whatsoever...still ambient temp. I'm not sure why it cooled some while on the electric heater???

I am thinking the cooling unit is Tits Up. I would be interested to hear what you may think. I appreciate any and all views and opinions...thanks.

John
  • Travelin2's avatar
    Travelin2
    Explorer
    Jan 22, 2019
    Thanks for the thoughts fellas. I do know this fridge is old so if it is time it's time. The box is in good shape all except the plastic liner on the inside is yellowed due to age. Doesn't affect it's performance though. I do know it takes a day to get cooled down well but after 3 hrs I figured I should be feeling a little warming of the coils. I will leave it on tonite and see if it has a change of heart by tomorrow.

    Russ, thanks for that link.
  • rhagfo's avatar
    rhagfo
    Explorer III
    Jan 22, 2019
    If the cooling unit is failing,but the cabinet is in good shape replacing the cooling unit is a great way to get it working again.

    This is where I have gotten two cooling units and both work great.

    RV Cooling Unit Warehouse
  • midnightsadie's avatar
    midnightsadie
    Explorer II
    Jan 22, 2019
    you do know that it takes at least 12hours for the frig to cool down? also theres companies that rebuild them.
  • Chum_lee's avatar
    Chum_lee
    Explorer
    Jan 22, 2019
    Your fridge is past due. Look around the rear at the bottom near the cooling coils for the unfortunate yellow residue left by leaking refrigerant. If you see it, you are done. Time for a new cooling section at the least.

    Chum lee
  • jkwilson's avatar
    jkwilson
    Explorer III
    Jan 22, 2019
    The cooling unit is the same on gas and electric, so if it works on one it works on the other. Only difference is the heat source.

    You could have a dirty flue or partially clogged orifice. Could also be a regulator issue. Hard to judge a good or bad flame visually. There is a bit of a roar to a good flame that is missing if the pressure is low.

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