Freeze Protection Heater

RTG20319DN Cold Weather Heater – OEM Component for Freeze Protection in Rheem Systems

The Rheem RTG20319DN Freeze Protection Heater is an original equipment part designed to prevent freezing in Rheem tankless gas water heaters. This component is critical for maintaining system integrity during low ambient temperature exposure, especially in unconditioned spaces or exterior installations.

The heater functions by activating at predetermined temperature thresholds to prevent the internal water lines and heat exchanger from freezing. It is engineered for precise thermal response and integrates directly with Rheem's control system architecture, ensuring reliable cold-weather operation.

Primary Function and Use

• Maintains internal water temperatures in freezing environments
• Prevents damage to heat exchangers, piping, and internal valves due to ice formation
• Required for safe cold-climate operation of Rheem outdoor tankless units

Technical Specifications

• Part Number: RTG20319DN
• Application: Rheem tankless gas water heaters (model-specific compatibility required)
• Type: Electric resistance heater element with integrated sensor feedback
• Installation Location: Typically mounted near the heat exchanger or water lines inside the enclosure
• Material: Thermally resistant, corrosion-protected components rated for extended duty cycles

Installation Requirements

Installation of the RTG20319DN should be completed by a licensed technician familiar with Rheem tankless heater configurations. The heater must be correctly positioned and wired to the existing control board and thermistor network to ensure proper operation. Misplacement or improper connection can result in ineffective protection or system fault codes.

Contractor Notes

• Confirm part compatibility via unit serial number and wiring diagram before service
• Inspect for continuity and correct temperature setpoint activation after installation
• Verify that all freeze protection heaters in multi-heater arrays are matched and functional

Key Features

• ✔ OEM Rheem Component – Ensures correct fit and function with designated units
• ✔ Thermally Actuated – Activates automatically below safe temperature thresholds
• ✔ System-Specific Wiring – Designed for plug-and-play connection into Rheem harness assemblies
• ✔ High Durability – Rated for continuous duty in high-moisture, low-temp environments

Prevent Cold-Weather Downtime

Failure to maintain adequate freeze protection can result in ruptured components and full unit replacement. The RTG20319DN is a critical safeguard that ensures operational continuity in low-temperature conditions. Always replace damaged or non-functional freeze protection components as part of regular cold-season service prep.