high limit switch

  1. P

    Jandy JXI 400NK heater high limit, check IGT and constant on/off

    I was having this issue with my Jandy JXI 400N heater that would constantly turn on, heat for a few minutes and then turn off and give a high limit, check IGT errors. I was able to fix the issue by just replacing the TRV valve. I originally got the part from Amazon and ended up being incorrect...
    • Pietro167
    • Thread
    • check igt high limit switch jandy 400 jxi heater thermal valve trv
    • Replies: 1
    • Forum: Everything Else
  2. J

    Pentair Mastertemp 400 High Limit Error

    Looking for guidance and advice for an issue I’m having with my Pentair Mastertemp 400 gas heater. We keep the heater at 68 through winter and raise the temp when we want to use it as a “hot pool”. Turned the temp to 80 two days ago to get it closer to our desired temp for Christmas Eve. On...
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