Forum Discussion
DSDP_Don
Jul 03, 2015Explorer
"johnsonbert"...I had a 2005 Monaco Diplomat with the Dometic heat pumps and had the same issue. On mine it was the reversing valve. If you get the long model number off of the unit, you can go to PPL Parts, go to their Dometic A/C section and then look for your model number. They list all of the parts for your A/C unit. I bought the reversing valve and a new start capacitor, since mine was crushed by the clamp when Dometic installed it. The reversing valve fixed the issue. As stated above, the default is Heat Pump and when the reversing valve quits, it won't kick it over to A/C. It's a very simple replace.
If you don't trust the diagnosis, pull the reversing valve off of one of your other A/C units and swap it out. It's a single bolt and long wire with a spade connector. Don't forget to ground the capacitors before playpng/touching any of the connections.
If you don't trust the diagnosis, pull the reversing valve off of one of your other A/C units and swap it out. It's a single bolt and long wire with a spade connector. Don't forget to ground the capacitors before playpng/touching any of the connections.
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