service

  1. L

    Mastertemp 400 not working

    Currently having an issue with my heater. It was running fine last night, went up to 100 degrees, but today it won't heat. When I turn it on, the ignitor kicks on, then immediately turns off. I can hear a subtle beeping and the service heater light comes on. There is no water flow issue as water...
  2. R

    Kids in Pool During Service Mode?

    So my kids really want to swim today but when I went to turn on the filter and waterfall, the screen flashed a service mode active message at me. Now, I do know that the pool man was at the house on Monday doing what he does and I am not alarmed by this message but is it still safe for the kids...
  3. C

    Pentair MasterTemp 250 runs for couple minutes then triggers Service Heater light

    It starts fine, runs for 2-3 minutes then triggers the Service Heater. I took the front panel off to see the LEDs on the board and I see nothing that is on. What would tigger the Service light if no LEDs are triggered? If I turn it off and turn it back on, it will run again for the 2-3...