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    Pentair MasterTemp 400 keeps cycling on & off

    James, you're truly a TFF expert. As soon as I read your reply about the 3-port valve going into the heater, I thought right away it all make sense. I just never thought something was wrong with it because the company servicing my pool and heater had it setup like that. Bought the house 2.5...
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    Pentair MasterTemp 400 keeps cycling on & off

    There are error codes in front and no unusual LED indicators lit on the back of the panel.
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    Pentair MasterTemp 400 keeps cycling on & off

    I just approximated water flow based on the pump RPM. I opened the pool 3 weeks ako with freshly cleaned filter with psi running from 22-30 depending on the rpm. The pressure gauge is also less than a year old. If I were to get a flow meter, where should I install it (before or after the...
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    Pentair MasterTemp 400 keeps cycling on & off

    I did a bunch of troubleshooting today. 1. I removed detached the terminals from the termistor and got an E01 error code on the panel. I connected my old termistor and got a reading of 85 degrees. When I hold it, the temp slowly went up to 90. I then reconnected the terminal on the new...
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    Pentair MasterTemp 400 keeps cycling on & off

    I'm trying to upload a 32mb mp4 video file, but it's too large. I actually strip the video from 600mb. Anyway, it cycles as soon as I turn the heat on. Burber ignites and try to heat water for a few seconds and then lights turns off, temp will count up fast from current temp 75 to about 124 and...
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    Pentair MasterTemp 400 keeps cycling on & off

    I have a MasterTemp 400 that I have been troubleshooting since last year. I've check different foruns and looks like a common issue, but I have yet to see a resolution. Perhaps you can help. As soon as I turn the heat on, I see a 75 reading. It 'heat' blinks to call for heat and then steady...