Duo Therm AC/Heat Pump Problem - Reversing Valve?

[DFWBert]

OK - please bear with me - i'm new to Forums and posting ........

I have a 2002 Monaco Diplomat purchased 4 months ago with 23K miles.

Just came back from first long trip ( TX - NY - TX ) and while in NY turned the rear Duo-Therm Heat Pump on heat setting one chilly night.

Now don't seem to be getting any AC or heat from it.

Pulled the outside cover and installed a hard start SP6 something or other I read about on this forum. NO CHANGE -

All fans and compressor run and compressor gets hot ( very warm) and line going into reversing valve is warm but none of the lines coming out seem to be very warm and none of the lines I can touch in the top unit are cold.

Does anybody know how to test the reversing valve or what position it should be in for AC ?

Can I remove the relay and move the reversing valve by hand?

DFW Bert

[Rex]

Can't move the reversing valve by hand. A good tap with a wrench or hammer may jar it loose as they sometimes will stick.

[RV Wizard]

You can tap on it as Rex has suggested but be mindful not too hard as the refrigerant lines could be damaged an you could end up with a leak. Try the cool mode and then the heat mode a couple of degrees above ambient temperature. I think the reversing valve is energized in the cooling mode. Verify that you have 120 vac to the solenoid. If not you will need to diagnose the control board to see why.

[tnance]

RV Wizard hit the nail on the head. We have had the same problem with an identical unit. This has happened to us several times in the past.
Since we live in South Texas we don’t use the heat pump that often. We just spent all of July in northern Colorado where we needed to run the heat pump. We had the same problem as you described. I just cycled the heat pump back and forth from AC to Heat. That did the trick.

[DFWBert]

Thanks,

I'll try cycling the unit & ck voltage.