Hi all. I am having an issue with my pool heater and I saw similar issues in some old threads so thought I would post here. I had a pool guy change out my thermastor and then my control board in my Pentair Mastertemp 400 (about 6 years old) trying to resolve the my issue. Basically I could not get my spa to heat above 85. I would set it on my phone to 100+ and it would just shut off at 85. Well now that I’ve spent $600 I see in the old post that the set temp on the heater must be set at 104 (it was at 85!). I have now done that and the spa is heating (so I guess I need to get my money back!). Ok so now I’ve found a second problem. It is heating but the heater shows that the temp is up to 104 and it shuts off because it has reached the heater set temp. But the controller (and my phone) say that it’s at 100…and based on my not so amazing candy thermometer, I believe the controller not the heater. Problem is the heater shuts off when it thinks it hit 104. Any way to get them more in sync? And one more question…does the system heat the pool the same way? Basically on/off and that’s hit so I need to make sure the set temp on the heater for the spa AND the pool remain at 104 all the time?
Thanks doe your help!
Jason
Thanks doe your help!
Jason