So project 1 of 5 done and now I’m on to my A/C issue and would love all your input as honestly, it’s been invaluable!

Here is what I’m seeing:

* ac will fire up and run swimmingly for an hour, may even 3 or 4 hours... but then it stops. The fan still blows, and according to the panel it’s calling for cold air, but the water pump turns off and no cold air??

My first thought is the water pump is bad, and once the pump stops the AC shuts off, but I get no HPF error or anything.

On a side note, it has always struggled to switch between heat and cold. Not sure if that plays into it or not. I’m grasping here but thought maybe the reversing valve is bad?

To me the key factors are:
* it’s calling for AC
* no water flow
* works fine for a while then just stops doing its job

Any idea of where to start? Are these units repairable or is it usually a remove and replace type situation?

Thanks all!!