Dometic A/C issue

[Michael H]

Hi Gentlemen,
I have 2021 Riverstone FKRB with 3 units. The rear two units appear to work ok even though fans are incredibly wimpy. The front unit blows warm inside. However, on the roof, the unit blows cold.
The other two units send cold air through the ducts into the bedroom and front bath, but not enough to even begin to cool the area.
I gave had an HVAC guy up there but he doesn't understand it either.
Does this make sense to anyone?
Thank you so much,

Mike

 

[Sealyn]

Are the fans set to Auto?

 

[Michael H]

If you mean inside at the control panel, their is only on or off. No fan control.
Is their supposed to be a auto setting on the roof? I can tell you when the temp calls for the unit to run, the compressor kicks on and blows. It is just cold at the unit and warm air at the inside.
Thank you for responding

 

[AbdRahim]

Do you have the front one set on HP (heat pump). This would work the opposite of the “cool” setting. That is warm on the inside and cold on the outside.

 

[Michael H]

Thank you. No the heat pump is actually on the rear unit and doesn't work either.

 

[Kevin D Pem]

My first thought was as @AbdRahim stated. Heat pump!