The Rinnai Thermistor Sensor, Supply (805000155) is a genuine OEM replacement part for i-Series Plus combination boilers. Positioned on the supply side of the heat exchanger, this sensor measures outgoing water temperature and provides critical feedback to the control board for setpoint regulation. A failed supply thermistor can result in temperature overshoots, error codes, or inconsistent heating performance. This OEM replacement restores precise supply temperature monitoring.
- Genuine OEM Rinnai replacement thermistor sensor
- Compatible with Rinnai i-Series Plus combination boilers
- Monitors supply water temperature at the heat exchanger outlet
- Corrects temperature overshoot and setpoint control errors
- Restores accurate heating setpoint regulation