Pentair MasterTemp & Max-E-Therm Heater Thermistor 42001-0053S | Swimables SW-41-053

Pentair MasterTemp & Max-E-Therm Heater Thermistor 42001-0053S | Swimables SW-41-053

Marsoni

M251S

$49.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Pentair MasterTemp & Max-E-Therm Heater Thermistor 42001-0053S | Swimables SW-41-053The Swimables Thermistor SW 41 053 is the sensor behind the temperature reading shown on your heater's control panel. When the display begins reporting abnormally high temperatures, that is a clear signal that this component has failed and needs replacement. Because the thermistor is a non resettable part, the only remedy is a fresh unit. Compatible with most Pentair MasterTemp, Sta Rite Max E Therm, and ETI 400 Natural Gas swimming pool heaters, the

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Reviewed in the United States on February 11, 2026