The Pentair Thermistor 42001-0053S is the OEM sensor responsible for relaying water temperature readings to your heater's control panel display. When your panel shows inaccurate or abnormally high temperature readings, a failing thermistor is typically the cause and replacement is the only remedy, as this component cannot be reset. Positioned within the manifold adapter inlet, this electronic temperature-sensing thermistor continuously monitors incoming water temperature. When water falls below the temperature set point on the operating control, the burner controller activates power to the combustion air blower through a sequence of safety interlocks. This genuine Pentair part fits most Pentair MasterTemp, Sta-Rite Max-E-Therm, and ETI 400 Natural Gas Swimming Pool Heaters.

Key Benefits

• Accurate Temperature Monitoring: Delivers precise water temperature data to your control panel, making it easy to identify when the sensor needs replacement due to erratic readings.
• Factory-Original OEM Component: This genuine Pentair thermistor is built to exact manufacturer standards for designated heater models and requires full replacement rather than resetting when it fails.
• Broad Heater Compatibility: Integrates directly with most Pentair MasterTemp, Sta-Rite Max-E-Therm, and ETI 400 Natural Gas Pool Heater systems.
• Automated Heating Logic: The electronic temperature-sensing mechanism governs heater activation through safety interlocks, maintaining both efficient operation and system protection.

Compatibility

• Pentair Sta-Rite Max-E-Therm Heaters
• Pentair MasterTemp Heaters
• Pentair ETI 400 Heaters

Specifications

• Brand: Pentair
• Part Number: 42001-0053S

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42001-0053S
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