Outlet Thermistor Kit (W/ O-Ring, Bracket And Screw)

RTG20319R Outlet Thermistor Kit – Accurate Outlet Temperature Sensing for Rheem Systems

The Rheem RTG20319R Outlet Thermistor Kit provides precise measurement of hot water temperature as it exits the heat exchanger. This sensor is critical for maintaining system efficiency and temperature consistency in Rheem tankless gas water heaters. When operational, it feeds real-time data to the control board to regulate burner output and ensure delivery of accurately heated water.

This OEM replacement kit includes the outlet thermistor, a securing bracket, O-ring seal, and mounting screw. Each component is engineered for a secure and leak-free fit in compatible Rheem models. Use of genuine Rheem thermistors ensures full compatibility with factory control algorithms and diagnostic systems.

Kit Contents

• Outlet thermistor with factory connector
• O-ring for thermal sensor port seal
• Mounting bracket and fastener

Function and Application

• Monitors outlet water temperature in real time
• Supports burner modulation and anti-scald functionality
• Prevents system errors caused by thermal drift or failed sensors

Technical Specifications

• Part Number: RTG20319R
• Sensor Type: NTC thermistor
• Installation Point: Outlet water line of tankless heat exchanger
• Compatibility: Select Rheem RTG series tankless gas water heaters (verify with model-specific documentation)

Installation Guidance

This sensor should be installed by qualified technicians due to its impact on system operation and safety controls. Proper alignment of the thermistor and secure O-ring placement are critical to prevent water leakage and sensor error codes. After installation, reset the control board and verify that no diagnostic codes are present.

Contractor Notes

• Check thermistor resistance values before and after installation for calibration assurance
• Inspect O-ring seat for debris or damage prior to insertion
• Confirm harness connector is fully seated and undamaged

Key Features

• ✔ Factory-calibrated sensor – Ensures system integrity and compatibility
• ✔ Complete installation kit – Includes mounting hardware and seal for time-efficient service
• ✔ Supports fault detection – Enables accurate troubleshooting through integrated diagnostics