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Just posting for future reference for those with the same problem: Pentair ic 40 3 years of seasonal use in the northeast . Last year flow light red despite adequate flow. Replaced flowswitch under warranty. Problem solved. Fast forward 8 months later to this swim season (out of warranty)...

Recently I noticed that the flow light is slow to turn from red to green when the pump turns on. Returns show strong flow and filter pressure is 5psi over initial charge with DE. When the pump turns off the flow light stays green for some time despite no flow. I washed out the cell with a hose...

I have a pentair mastertemp 400 for about a year now without any problems. However twice in the past week I come home from work to find the heater on in spa mode. I do not have automation. In order to turn on the heater I have to manually push either pool or spa mode on the unit. I do have a...