May 1, 2014

How to replace a window air conditioner user interface control board

By Lyle Weischwill
How to replace a window air conditioner user interface control board

This step-by-step repair guide explains how to replace the user interface control board in a window air conditioner. Located in the control panel, the user interface control board displays the settings and sends signals to the electronic control board to activate components when you push the buttons. If the display won't light up or if the control panel won't respond when you select a button, replace the user interface control board with the manufacturer-approved replacement part.

The steps in this repair guide will help you replace the user interface control board in Kenmore, Frigidaire, GE, LG and Crosley window air conditioners.

Quick links
Tools required
Phillips screwdriver
Work gloves
Repair difficulty
Time required
30 minutes or less
Repair difficulty
Time required
30 minutes or less

Instructions

  1. 01.

    Disconnect electrical power

    Unplug the power cord from the wall outlet.

  2. 02.

    Remove the front grille panel and filter

    Grasp the sides of the front grille panel at the top and pull the panel out and off of the air conditioner.

    Pull the filter out.

    Tip: Take this opportunity to clean the air filter if necessary.
    Remove the air filter.

    Remove the air filter.

  3. 03.

    Remove the control panel

    Remove the screws from the sides and bottom of the control panel.

    Pull the control panel up and hold it above the air conditioner. Unplug the wire harness connection for the user interface control board.

    Set the control panel face down on a padded work surface.

    Remove the screws from the sides of the control panel.

    Remove the screws from the sides of the control panel.

    Remove the screws from under the control panel.

    Remove the screws from under the control panel.

    Pull the control panel up and hold above the air conditioner.

    Pull the control panel up and hold above the air conditioner.

  4. 04.

    Remove the user interface control board

    Remove the screws in the sides of the user interface control case and open the case.

    Remove mounting screws from the user interface control board. 

    Pull the user interface control board out of the case and release the wire harness from the molded plastic retainers on the control panel.

    Open the case.

    Open the case.

    Remove the mounting screws.

    Remove the mounting screws.

    Remove the user interface control board.

    Remove the user interface control board.

  5. 05.

    Install the new user interface control board

    Insert the user interface control board in the case and reinstall the mounting screws.

    Route the wire harness through the molded plastic retainers on the control panel.

    Close the case and reinstall the screws on the sides of the case.

    Install the new user interface control board,

    Install the new user interface control board,

    Reinstall the user interface mounting screws.

    Reinstall the user interface mounting screws.

    Reinstall the screws in the case.

    Reinstall the screws in the case.

  6. 06.

    Reinstall the control panel

    Position the control panel above the air conditioner and plug the user interface control wire harness back in.

    Position the control panel on the front of the air conditioner and reinstall the mounting screws in the control panel.

    Reinstall the control panel.

    Reinstall the control panel.

    Reinstall the control panel mounting screws.

    Reinstall the control panel mounting screws.

  7. 07.

    Reinstall the front grille panel and filter

    Insert the filter on the front of the air conditioner.

    Position the front grille panel on the front of the air conditioner and snap the front grille panel into place.

    Reinstall the filter.

    Reinstall the filter.

  8. 08.

    Restore the power

    Plug the air conditioner into the electrical outlet.

Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.

Symptoms for window air conditioners

Choose a symptom to see related window air conditioner repairs.

Main causes: bad compressor, lack of refrigerant, bad compressor start relay, electronic control board failure
Main causes: turning the air conditioner off and the back on too quickly, dirty or restricted condenser coil, compressor failure
Main causes: dirty air filter, air conditioner is too small for the room, temperature set too cold, control failure
Main causes: clogged drain hole, air conditioner not leveled properly
Main causes: clogged condensate drain, air conditioner not leveled properly, leaky window air seals
Main causes: lack of electrical power, bad electronic control board, wiring failure, bad temperature sensor

Repair guides for window air conditioners

These step-by-step repair guides will help you safely fix what’s broken on your window air conditioner.

How to replace a window air conditioner ambient thermistor

If your window air conditioner isn’t cooling properly, it might need a new ambient thermistor. You can replace it yourself following these instructions.

Repair difficulty
Time required
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How to replace a window air conditioner user interface control board

Control buttons or lights on the user interface control board can stop working. This repair guide shows how to replace it.

Repair difficulty
Time required
 30 minutes or less
How to replace a window air conditioner electronic control board

The electronic control board is the brain of your window air conditioner. Here’s how to replace it.

Repair difficulty
Time required
 45 minutes or less

Articles and videos common to all room air conditioners

Use the advice and tips in these articles and videos to get the most out of your window air conditioner.

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