GE air conditioner shows F4 and may not respond to keypad or remote inputs

Safety: Disconnect power.

Procedure:

• Inspect keypad: Check for stuck buttons, cracks, or signs of water damage on the front control panel.
• Access control panel: Remove the front grille and unscrew the control panel. Carefully pull it forward.
• Check ribbon cable: Ensure the flat cable between the keypad and display/control board is fully seated and not damaged.
• Dry moisture: If condensation or water is present, dry thoroughly and allow several hours before reapplying power.
• Replace keypad: If buttons are unresponsive or shorted, replace the keypad/user interface assembly.
• Replace display board: If a new keypad does not resolve F4, replace the display/control board.