Question about Pentair Minimax NT Heater

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I have a Pentair minimax 250k electronic. Opened pool today and when I turned power on to the heater, it won't get through startup sequence. Dashed lines flash, then 888 and service light comes on. No error codes. Setting the heater temp does nothing because it goes right back to flashing the --- then 888 (with service light). No error code given. I called a pool repair guy and he immediately said its the blower that needs to be replaced, but I don't have the pool temp set for the blower to even attempt to turn on. I did try, but same startup sequence bouncing.

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Most of the time I have found the problem to be the thermistor. It is located on the water manifold of the heater. Usually the panel lights, flashes then to 888 and back to dashed lines. SW light is green, and service light is red. It costs 25 to 45 dollars, and takes 5 minutes to repair. New thermistor looks identical to old so replacing it is very easy.
thanks please let me know if this was helpful

Posted on Jun 19, 2011

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