20 Most Recent Pentair Minimax NT Heater Questions & Answers

Check the hose going from the fan housing to the control board. I found that it was very loose at the fan connection; wrapped a thin strip of masking tape around the barb, reconnected the hose and it works fine now.

check the air flow switch the fan must close this switch for the ignitor to light

if you have incoming power, you may have a bad transformer. those systems run on 24-28v. you can check from yellow wire to yellow wire coming off the transformer to see if you have anything coming out. must check wires coming out of the transformer to each other, it won't register if you check each one individually to ground. hope this helps...

Sounds like the controller is the problem. This is the circuit board that has the display and controls on it. You can swing that panel open and try tapping on the white plastic cover the controller is under that. This might get the fan relay to release but you will have to replace the controller it will stick again

flame sensor falure, probally your pilot.

sounds like a water flow issue check your bypass valves check for clogged filter or thermal regulator ,or manifold bypass

I would call the Pentair technical support line because they may be able to help you figure this thing out. I hope this helps.

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