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  1. Old Beach Guy

    Pentair Mastertemp 250 cuts on and off

    Got the new thermal regulator installed awhile ago. Everything is working well. The parts man at my pool company said salt water pools hasten to failure of these. Has anyone heard that?
  2. Old Beach Guy

    Pentair Mastertemp 250 cuts on and off

    It's a salt pool. I plan on setting the heater on a weekly schedule. Here on the SC coast, our water has a high PH. I go through about 1/2 gallon of acid a week. By the way, it won't hurt to run the system without the part if the valve to the spa is off will it?
  3. Old Beach Guy

    Pentair Mastertemp 250 cuts on and off

    Y'all are the best. I took the thermal regulator out this morning and sure enough it doesn't open. Since it's under warranty, my pool company is getting me a replacement. It seems a little corroded. I haven't fired up the heater in a couple months. Should I run it every week or so to keep...
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  5. Old Beach Guy

    Pentair Mastertemp 250 cuts on and off

    Last night I turned on my Mastertemp 250. The water temp was 65 initially. It worked fine until the water temp. got to around 85. Then it began to shut off, and the service heater light would come on for about a minute. It would go off and the heating light would come on and it would...
  6. Old Beach Guy

    Hello from the SC coast.

    We moved into our new home in June 2018, and completed the pool and landscaping in July 2019. I like to do all my own maintenance around the house. I've got a lot to learn about care and upkeep of our salt water pool. Thanks in advance for your patience. This NOOB is full of questions.
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