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dpgllg's avatar
dpgllg
Explorer
Jul 13, 2019

Dometic AC potential issues

SEE UPDATE ON PAGE 2

My Dometic AC froze up while camping last weekend. I would let it thaw and it seemed to work for awhile and then freeze up again.

When we got it to the storage yard I took the inside cover off and discovered that the Freeze control sensor was not connected. I ordered a replacement and brought the RV home so I could plug it in. I replaced the sensor and the air is moving but it does not seem that cold to me.

I made sure that the baffle between the warm and cold air was in place and not leaking. The AC is putting water out across my roof as expected.

My brother looked at it and he said "maybe" the compressor is going bad. I have no clue how to tell if the compressor is having issues.

This AC is 25 months old so it shouldn't be worn out. I have already talked to Dometic and they are going to extend my warranty to get it repaired or replaced but I have to wait for an appointment anywhere between 4 to 6 weeks to get into the shop.

While I'm waiting is there anything else I can do to troubleshoot the AC? I'm going to let it run awhile to make sure that the freeze up is resolved. If it does freeze up again then it's possible that the Freon is low. Since it is a sealed unit then a replacement would be required.

Thanks in advance for your assistance!

Dave

14 Replies

  • dougrainer wrote:
    1. The freeze Sensor not connected. WHY would you install a new one? Why not just install the old one?
    2. They are sealed systems. IF you had a leaker, then ALL the coolant would have been gone by now. They only hold a 16 ozs of coolant.
    3. Water Coming OFF the roof indicates the Unit is doing its job.
    4. Your brother and you have no way to tell if the compressor is "going" bad:B FYI, your compressor is not going bad.
    5. How hot is it and how big is your RV? Doug


    OP here,

    The end of the sensor did not have the flat blade attached so it broke off or whatever. To be safe it wasn't an expensive part so I replaced it.

    I stated that I had no clue about the compressor. Was hoping for a little feedback if there was any simple way to determine any issue with it.

    It was in the mid 70's now 80 at noon and the AC has not shut off at all.

    It is a 32 foot 5th wheel and the AC is a 15,000 BTU unit.
  • 1. The freeze Sensor not connected. WHY would you install a new one? Why not just install the old one?
    2. They are sealed systems. IF you had a leaker, then ALL the coolant would have been gone by now. They only hold a 16 ozs of coolant.
    3. Water Coming OFF the roof indicates the Unit is doing its job.
    4. Your brother and you have no way to tell if the compressor is "going" bad:B FYI, your compressor is not going bad.
    5. How hot is it and how big is your RV? Doug
  • Put a thermometer in the return air and note the temperature. Then put the thermometer in the discharge air flow and note the temperature. What is the difference? If the discharge is 18 or more degrees colder, everything is good.

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