StaRite Max-E-Therm Heater 400K BTU HD not firing

[wbowlin]

My pool heater will not come on. When I look at the temperature on the LCD display it shows 107. Water temperature in the pool is 60 degrees. I'm assuming I need to replace the Thermistor but wanted to get advise before ordering.

No service lights or error codes. It won't fire from the automation control or manually from the LED panel on the heater.

Thanks in advance for your help!

 

[ajw22]

Welcome to TFP.

Put a 10K resistor connected to the temperature sensor wires. If the heater reads 76F then the sensor is bad.

If you don't get a good temperature then check the wires for critters chewing on it or replace the PCB.

Temperature Sensors - Further Reading

www.troublefreepool.com

Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com