Rheem rtg20319de Thermistor Kit Tankless Water Heater

Product Description

The RHEEM rtg20319de is a replacement thermistor kit designed for monitoring heat exchanger outlet temperature in Rheem tankless gas water heater systems. The kit includes a thermistor temperature sensor, an installation clip, and an O-ring for a proper seal at the sensor port. The thermistor delivers real-time temperature feedback to the control board, enabling burner modulation that keeps outlet water at the set point while protecting the heat exchanger from thermal stress. Licensed plumbers and HVAC technicians performing tankless water heater service will find this kit contains the necessary components for a complete sensor replacement in a single package.

This kit is intended for use in Rheem tankless gas water heater applications where the heat exchanger outlet temperature sensor has failed or is producing fault codes related to temperature sensing. It is suited for both residential and light commercial tankless gas water heater service scenarios. The included O-ring and clip ensure the replacement meets original assembly specifications without requiring additional hardware sourcing on the job.

Key Features

• Complete kit includes thermistor sensor, mounting clip, and O-ring for a full sensor replacement
• Monitors heat exchanger outlet temperature for accurate burner modulation and set point control
• O-ring included to maintain a proper seal at the sensor installation point
• OEM replacement part designed to interface directly with the Rheem tankless control board
• Addresses temperature-sensing fault codes in Rheem tankless gas water heater systems

Compatibility

Designed as an OEM-style replacement thermistor kit for Rheem tankless gas water heater systems requiring heat exchanger outlet temperature sensor service.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician. Shut off the gas supply and cold water inlet, and relieve system pressure before removing the existing sensor. Follow all applicable local plumbing codes and manufacturer service documentation when replacing thermistor components. Do not over-tighten the sensor fitting; use the supplied O-ring to achieve a proper seal without mechanical distortion.