Switch - Power On/OFF

RTG20319DJ Power Switch – Factory Replacement for Electrical Control in Rheem Tankless Systems

The Rheem RTG20319DJ is a factory-original power On/Off switch used in select Rheem tankless gas water heater models. This component serves as a direct electrical control interface, allowing safe manual activation or shutdown of the system. It is an internal control part, typically mounted on the front or main PCB housing, depending on model configuration.

This switch is engineered to meet manufacturer specifications for electrical capacity, enclosure integration, and long-term reliability in hot, high-humidity environments common in water heating enclosures.

Product Function and Application

• Enables manual power cycling of the tankless water heater unit
• Integrates with internal power distribution for control board and fan operation
• Required for proper system boot and shutdown sequences during service and maintenance

Technical Specifications

• Part Number: RTG20319DJ
• Component Type: Momentary or rocker switch (model-dependent)
• Application: Rheem tankless gas water heaters (model-specific)
• Mounting: Direct fit into OEM cutout; no adaptation required
• Material: Flame-resistant thermoplastic with moisture-resistant contacts

Installation Overview

Installation involves disconnecting unit power, removing the front panel, and accessing the main wiring harness. The old switch should be disconnected from its quick-connect terminals or soldered leads, depending on configuration. Replacement requires alignment with the designated control panel port and connection to the appropriate harness lead per model wiring diagram.

We recommend this component be installed by qualified service personnel to ensure compliance with Rheem's electrical standards and local codes.

Field Use and Best Practices

• Verify part compatibility with serial/model number before installation
• Inspect terminal leads for arcing or corrosion during service
• Test for continuity and system response post-installation
• Do not bypass this switch; required for safe manual override