Question about Sta Rite Sta-Rite Max-E-Therm Low NOx Pool and Spa Heater - 333K BTU Heavy Duty / Natural Gas

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The heater won't start. The temp reading is 126 F all the time. The thermistor resistance changes with temp change. No diagnostic lights are on. Does it need a control board or is there another test?

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Mine is doing the same. StaRite/Pentair tech support says the thermister needs to be replaced. I have one on order and will update on my status when I get the part replaced.

Posted on Jun 14, 2010

  • chipwheels Jun 23, 2010

    Replace thermister on the intake of the heater.

  • jimtee58 Sep 20, 2011

    I had the exact same problem listed here (having a 126 on the control board for the Sta-rite heater). After reading these updates, I decided to order the part and I installed it this afternoon. It was the right answer for my problem.

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