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Update for internet search posterity: Control board replacement did not fix the issue. Tech came back and replaced the pressure switch and it is now resolved. Some other notes: the pressure switch appeared to be leaking as the rubber cover over the switch was filled with water. I watched them...

Thanks for the response, TKpoolOH. I checked and my heater does not have the AutoSet feature. I contacted Pentair and they sent a tech out who diagnosed the issue as a bad control board which he replaced under warranty. The board is evidently associated with the pressure switch, but the switch...

Yes, I have turned the heater off. Thank you very much for your help!

Thanks for the response! The heater is above water level (in-ground pool). I will follow up on the pressure switch possibility, but in general, having a heat pump installed with no automation and using it the way I'm using it is OK?

I've had a Pentair UltraTemp for a little over a year. It works fine but when the filter pump is off the heat pump periodically turns on for a few seconds and then turns itself off. I started noticing this at the end of last season...not sure, but I don't think it did this when it was first...

The VRV is located on the output side of the top most panels. There's definitely no water leaking from the VRV and I have no air bubbles coming out of the returns so I think I'm good for now. What about the tech's method of turning up the speed on the pump until water came out of the VRV...

Thanks very much for your response. I did some more searching and reading yesterday and came across the suggestion on how to check if the panels are fully primed, by running the pump at a given speed and then turning it up higher to see if any more air comes out of the returns. I had been...

Hi all, I have a recently installed Pentair Intelliflo VSF pump and a solar heating system, and some questions about dialing in the variable speed pump to properly run the solar heat. I thought I had a good idea of how to do from searching these forums but the tech from the solar company...