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Thread: Pentair Plus Triton minimax heater troubleshooting help

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    Road scholar's Avatar
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    Pentair Plus Triton minimax heater troubleshooting help

    I have a Minimax 250 running on propane that short cycles: I have to turn the thermostat to full and heater will only stay on for a short period then turn off. Sometimes I can hear it cycle several times a minute and hear gas ignite and the shut off etc. Other indications are green pressure light but red service light is on until it cycles on. I called Pentair and they think it's the thermostat. Sounds likely as maybe it thinks it's already hot when it's really only 75-80 degrees. Is there any way to troubleshoot this by jumpering the temp probe wires at the connector before I order a $150 part?
    60' x 20' L-shape, 23K gal, NSW, IG Plaster, built spring 2002, 3 HP Inteliflo pump, Cartridge filter, gas heater, swim lane, volleyball net, Dolphin A30i robot.

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    JasonLion's Avatar
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    Re: Pentair Plus Triton minimax heater troubleshooting help

    The usual debugging technique is to jumper across each of the safety sensors until the burner lights normally. Onc eyou have it narrowed down to a specific sensor, you need to figure out if the sensor is correct that there is a problem or if the sensor is broken.

    Once common problem is not enough air flow due to debris in the burner area or the heat exchanger area.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Pentair Plus Triton minimax heater troubleshooting help

    Thanks Jason. I'll look at the flow sensor as well then. I have scaling on the plaster from last year. I hope I didn't get build up inside the coils effecting flow.
    60' x 20' L-shape, 23K gal, NSW, IG Plaster, built spring 2002, 3 HP Inteliflo pump, Cartridge filter, gas heater, swim lane, volleyball net, Dolphin A30i robot.

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    Re: Pentair Plus Triton minimax heater troubleshooting help

    My guess is one of the limits is bad. That usually is what causes the short cycling on heaters.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Re: Pentair Plus Triton minimax heater troubleshooting help

    Thanks Paul. Since the pressure LED stays lit during the fault I'm suspecting the limits as well. Pretty easy to jumper to see if the unit will stay on. BTW, I appreciate your word of caution on your sig line. I will only jumper a fault switch long enough to troubleshoot but won't operate with a bypass that's unsafe. I'll report back after I get a chance to try the jumpers.
    60' x 20' L-shape, 23K gal, NSW, IG Plaster, built spring 2002, 3 HP Inteliflo pump, Cartridge filter, gas heater, swim lane, volleyball net, Dolphin A30i robot.

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