Display Control Wiring Harness

RTG20319AE OEM Harness – Display Interface Communication for Rheem Tankless Systems

The Rheem RTG20319AE is a factory replacement wiring harness that provides signal and power connectivity between the main control board and the user interface display on compatible Rheem tankless gas water heaters. It is critical for proper display function, diagnostic communication, and command input recognition within the unit’s control system.

This harness is a direct-fit OEM component with terminal connectors that match factory specifications, ensuring consistent electrical performance and reliable interface operation. It is designed for internal routing within the water heater cabinet and should be installed only on compatible Rheem models.

Product Details

• Part Number: RTG20319AE
• Function: Links the user interface control panel to the system control board
• Application: Rheem tankless gas water heaters with electronic display controls
• Installation: Internal component replacement (requires unit access)

Component Role

• Transmits user commands from the display panel to the control board
• Enables data flow for temperature settings, diagnostics, and system alerts
• Ensures stable communication between interface and logic control circuitry

Installation Notes

This harness is an internal service component and should be installed by qualified technicians or licensed contractors. Installation requires disconnection of power, removal of system panels, and verification of correct terminal orientation. Loose or misaligned connections may result in system fault codes or inoperative displays.

Installation Tools Required

• Phillips screwdriver (for access panel removal)
• Needle-nose pliers (for connector handling)
• Multimeter (optional, for continuity check)

Use Cases

• Replacement of damaged or corroded interface wiring
• Resolution of display communication faults
• OEM harness swap during control board or display panel replacement

Professional Considerations

Use only for units specifically listed in Rheem service documentation for this part number. This harness is not universal and must match both physical connector type and system wiring schematic.