The Rinnai Thermistor Kit, part number 204000032, is a temperature sensing replacement component used in compatible Rinnai heating systems. The thermistor monitors system temperature and sends feedback to the appliance control board so the heater can regulate output and maintain stable operating conditions. Accurate thermal sensing is necessary for proper combustion control and efficient heater performance.
This kit is designed as a direct OEM replacement for worn or malfunctioning thermistors within Rinnai appliances. The sensor detects temperature changes through resistance variation and allows the control system to adjust burner operation accordingly. Installing a correct replacement thermistor helps restore normal system regulation and supports reliable heater operation during regular use.
What’s Included: Thermistor sensor assembly with lead wiring and installation components.
Installation Limits: For use only with compatible Rinnai appliances designed for this thermistor configuration; installation should follow manufacturer service procedures and electrical safety guidelines.
Compatibility: Compatible with selected Rinnai direct vent furnace and heater models including RHFE-431FA series, RHFE-431WTA series, RHFE-556FA series, RHFE-556FTRA series, and RHFE-556WTA series systems.