A/C Temps in 36CKTS (2013 model) ?

[Papicamper]

What should the nominal outlet ceiling vent temperature be for a Dometic 15K heat pump unit? This unit, originally working fine, has developed some sort of problem with cooling. The vent temp will not go lower than about 58-60 deg F. as measured with a laser temp device. By the way, in heat pump mode I measure in the 90s so I believe the heat side is working reasonably well. The bedroom unit (smaller and A/C only) drops easily to low 40s at the outlet. I'm trying to make a case but have no evidence to back up my claim that 60 degrees minimum (under proper outside conditions) just doesn't make it! Anyone know for sure? Thanks!

[donniedu]

Pull the ceiling grill off and take a look.mine was freezing up a couple years ago. Turned out that the foam board had come loose and partially blocked the air flow. Remember, a heat pump is nothing more or less an AC unit putting heat/cold inside. So, if one works, both work!

[Papicamper]

I agree about the heat/air relationship but since the heat side seems to be doing okay I am really wondering why the cooling side isn't. Air volume is great in both cases. I have no return I can pull off as some units do...ours is ducted and although it has two smaller returns (already cleaned/checked) there isn't anything right under the unit. Got word from Dometic that I should have 16 to 20 deg difference in return air relative to outbound air! I will heat up the RV this weekend and triple check differences. Never any freezing by the way. Thanks for input.