Lennox WP26X31393 Ptac User Interface Board

Product Description

The LENNOX WP26X31393 is a printed circuit board assembly (PCBA) serving as the user interface (UI) control board for packaged terminal air conditioner (PTAC) units. This board manages the front-panel controls, display, and input signals that allow occupants and technicians to set operating modes, temperature setpoints, and fan speeds. It acts as the communication bridge between the user-facing controls and the main control circuitry within the PTAC unit. HVAC technicians install this board when the existing UI fails to respond, displays errors, or loses button functionality, restoring full operational control to the unit.

This board is intended for use in PTAC systems, which are commonly found in hotels, motels, assisted living facilities, and multi-unit residential buildings. The WP26X31393 replaces a failed or damaged user interface board in applicable LENNOX PTAC installations. Installation typically occurs during a service call when front-panel unresponsiveness, blank displays, or erratic mode behavior is diagnosed as a board-level fault rather than a wiring or sensor issue.

Key Features

• Direct-replacement PCBA for the PTAC user interface position
• Controls display output, mode selection, and temperature setpoint input
• Interfaces with main PTAC control board to relay occupant commands
• Designed for commercial and multi-unit residential PTAC applications

Compatibility

Designed as an OEM-style replacement user interface control board for compatible LENNOX PTAC units. Verify the part number against the existing board label before installation.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect power to the PTAC unit at the circuit breaker before removing the front panel or accessing internal boards. Handle the PCB carefully to avoid static discharge damage to onboard components. Confirm all ribbon cable and connector seating after installation before restoring power.