Question about Pentair Minimax NT Heater

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I have a minimax propane heater. It will not turn on to heat the water. I have to bypass the pressure switch. Then sometimes that works. When I bypass it. It will take awhile to fire up. I have replaced the pressure switch several times. Still does the same thing.

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The pressure switch is not a problem it's a symptom. That is to say it's a safety switch. If the pressure runs to low it will shut the heater down rather than let it overheat from too little water flow and cause damage. If you have a by-pass valve make sure that is closed. Then make sure the baskets are clear and the big one make sure the filter is clean. This is usually the problem when the the pressure switch kicks. If all that fails take the pump apart and clean the impeller. That dosn't take much to stop the heater ether. Good luck.

Posted on Sep 28, 2010

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