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The Rheem K9900878009 Thermistor Heat Middle is an OEM part made for specific Rheem models. This thermistor acts as a temperature-sensitive resistor that provides accurate temperature readings to the system's control unit. It is delivered in Rheem factory packaging.
This thermistor is essential for maintaining correct temperature readings in heating systems.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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