Possibly something stuck in heatpump

[Trick]

AGP, Heatpump. I just opened the pool and heat pump has a Flo error.

It's a pressure switch sensor. To Troubleshoot I did a test jumper on the board, it turned on. I pulled the feeder hose for the pressure switch and water came out. Both good signs and initially leads me to a bad pressure switch.

But then I noticed my bypass valve seemed to be open. I think, this shouldn't be open unless there is excessive pressure going into the heater. I've never noticed previously if it was open or completely shut.

I do keep the inlet and outlet open when I remove my equipment for the winter. Maybe something got in there, even an animal or something.

I don't know what I should do. Maybe hook the plumbing in reverse to try and flush anything out. I don't even know if anything is there just guessing, still could bee a bad pressure switch.

I do know if u turn the shutoff valve on the output side in the heater it turns on. Which makes sense as pressure increases inside the heater activating the pressure switch.

Any ideas on where to go with this?

 

[Trick]

I hooked it up in reverse. There was definitely restriction then but some flow.

Connected it the correct way and the bypass seemed to stay closed, except when turning the pump on high, it would open slightly then close. The heater would also start for a second.

I kept turning the pump on and off eventually the heater stayed on. So I left it on high with the heater running.

Do pressure switches fail like this?