Question about Dometic Rooftop RV Air Conditioner

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My 25feet airstream a/c is not cooling, but blowing worm air.

I have been told i need to buy a new a/c. this unit is sealed and can not be recharged

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True they are a sealed unit. Depending on age, it's usually smarter to replace it, than have a technician, install fittings to recharge, and no warranty.

Posted on Jul 10, 2010

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WOULD LIKE TO KNOW IF THE FRIEDRICH SH15L30-B UNIT CAN BE RE-GASSED, AIR CON UNIT IS NOT COOLING DOWN ROOM, FAN AND COMPRESSOR SEEM TO BE WORKING, BUT HAVE BEEN TOLD THAT ITS A SEALED UNIT AND NEED TO BUY...


It is true that it is a sealed unit and should never need charged with freon unless a leak has developed. Most service techs will tell you that they cannot be recharged because you do have to break into the sealed system with a solder in valve or a line tap. They hold such a small amount of freon that finding and fixing the leak can be next to impossible and time consuming. Make sure that the inside and outside coils are clean. The outside fins can be brushed with a semi-soft brush like a toilet brush and then washed out with water. Make sure your power is off first. If the coils are dirty it will act just like it does if the refrigerant is low. 75 to 80 percent of air conditioner service calls are solved by cleaning the outside condenser coil. Brush up and down and do not put so much water pressure on it that the cooling fins start bending.

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Can my duo-therm air conditioner on my rv be recharged?


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1 Answer

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Unit works good? Is the compressor coming on but not blowing cold air? If the compressor is running but not cooling, then the main issue is usually with cleanliness of the condenser. Wash it out if this is the case. If the compressor is not coming on, multiple problems could be the reason.

These units do not have service ports as a normal AC does. If you have lost freon then there is a leak in the system somewhere as they are sealed. The process for recharging a rooftop unit is usually expensive and not fail safe. I would recommend a new unit if a leak is discovered.

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Double check your wiring .if the indoor fan is not blowing then you either have an electrical issue OR bad blower motor .

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