The Rinnai Thermistor Sensor, Return (805000154) is a genuine OEM temperature sensing component for i-Series Plus combination boilers. This sensor continuously monitors the return water temperature, providing data the control board uses to optimize boiler firing and modulation for maximum efficiency. A faulty return thermistor can cause erratic temperature control, error codes, or system shutdowns. Replacing with this OEM sensor restores accurate temperature monitoring and proper system control.
- Genuine OEM Rinnai replacement thermistor sensor
- Compatible with Rinnai i-Series Plus combination boilers
- Monitors return water temperature for accurate boiler control
- Resolves error codes caused by faulty temperature sensing
- Ensures efficient and stable heating operation