42001-0053S Thermistor by Pentair | MasterTemp Sta-Rite Max-E-Therm ETI 400 Gas Heater Sensor

42001-0053S Thermistor by Pentair | MasterTemp Sta-Rite Max-E-Therm ETI 400 Gas Heater Sensor

Marsoni

M251S

$79.99

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

42001-0053S Thermistor by Pentair | MasterTemp Sta-Rite Max-E-Therm ETI 400 Gas Heater SensorThe 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

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I will use this in every car I own from now. Cleaned it real well did exactly what it said so and my truck runs a lot better definitely can tell the difference.. it was work the extra oil and work. The bottle I bought came with instructions in English, which made it easy for me. The quality of it is light brake cleaner, but meant for engines and it ran great very easy to use this pour in.

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Reviewed in the United States on October 19, 2025

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Beni

Lexington, US

★★★★★ 5

Does its job.

Always a go to before oil changes. Helps remove some extra sludge/deposits. DO NOT DRIVE OR REV THE VEHICLE WHEN USNG THE PRODUCT, only idle for 10-15 min. Ive seen reviews where people drove with it potentially ruining the engine.

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Reviewed in the United States on March 26, 2026

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Adan Ichich

Alexandria, US

★★★★★ 5

Calidad de limpieza al motor

Excelente producto, lo llevo usándolo un buen tiempo, en cada cambio de aceite, limpia bien por dentro del motor. Es fácil usarlo, hecharlo donde se llena el aceite del motor, y enciende el motor espere 10 minutos, y apague el motor, y vuelve a esperar 25 o 30 minutos para que se enfríe el motor, ya cumplido lo 25 o 30 minutos sacar el aceite viejo del motor. Listo, producto muy recomendable. Excelente funcionamiento, chevy silverado 2004

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Reviewed in the United States on March 15, 2026

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Kwang's Chowover

Alexandria, US

★★★★★ 5

Good

Very nice very good

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Reviewed in the United States on February 10, 2026