Problem w/ dometic penguin a/c. upgrade kit?

Bad run capacitor or bad compressor. If you hear an occasional click from the compressor try a new run cap and then a hard start kit. Otherwise it's more economical to purchase a new unit.

mud daubers will build dirt nests anywhere pull cover on roof see if drain stopped up

You may just need to upgrade to a newer duo therm. Check out Dometic RV Refrigerator Parts and Products for Sale he's got a couple.

the hard start kit wont harm unit but you need 3500 watts for one a/c

Have you checked for frost on coils/fins when you remove filter at ceiling assy? Non-ducted I presume?

Leaks can be repaired, some quite easily and others while difficult to find - and get to - prove somewhat more difficult.

The problem with 'leaks' is sometimes they are 'high pressure leaks' which are some of the more difficult ones to find.

So... the answer to your question is yes - but.

I would try and get a very experienced Service Tech to fix the leak, and one who will stand behind his work.

good luck!

Unfortunately, your rear unit is calling for heat. If you put the rear unit on heat pump mode, does it then cool?
The reversing valve is energized in the cool mode of these AC's. So there is no real way to bypass it. I would check the thermostat and the control board in the unit to make sure that the switches are set correctly.

In the service manual section of the dometic/Rooftop RV Air Conditioner section. I have posted service manuals for the Heat Pump and the Comfort Control.

Hope this helps,

Jeff

Rate me please.

Have you checked the capacitors ?

Did you try contacting Dometic directly, to speak to a technical assistant. ( www.dometicusa.com )

Ice on the coil is caused by 3 things; 1, low freon charge. 2, inadequate air flow across the coil, this can be a filter or dirty coil (I think you addressed these) or the fan isn't blowing enough air over the coil. 3, the unit is running continuously. A heat pump has another cause, that is something defective in the defrost system, like the sensor, reversing valve, control board or relay. If the breaker is tripping its because the compressor is over amping. There can be an obstruction blocking the fan or something like #2. Or the compressor is going out. If the breaker doesn't trip on other settings, like cool, but trips on heat, then I would look at the airflow.