Window air conditioner repair guides

Don't get hot under the collar over a window air conditioner that's not cooling a room. These step-by-step repair guides show you how to do common repairs such as replacing the electronic control board or installing a new thermistor. And we have more helpful information, like symptoms and solution and maintenance tips for top air conditioner brands such as Kenmore, Frigidaire and LG. Search your model number to find a complete list of replacement parts, then order the part you need.

window-air-conditioner

Repair guides common to all 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 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 condenser fan

If the condenser fan blade is broken or the condenser fan motor won’t run, you can replace the broken parts yourself by following these instructions.

Repair difficulty
Time required
90 minutes or less
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
45 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
Symptoms for window air conditioners

Choose a symptom to see related window air conditioner repairs.

Main causes: dirty air filter, air conditioner is too small for the room, temperature set too cold, control failure
Main causes: lack of electrical power, bad electronic control board, wiring failure, bad temperature sensor
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: clogged condensate drain, air conditioner not leveled properly, leaky window air seals
Main causes: clogged drain hole, air conditioner not leveled properly
Articles and videos for window air conditioners

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

February 15, 2018
How to maintain your HVAC system video
By Sears PartsDirect staff

6 ways to extend the life of your HVAC system.

February 1, 2018
How to read a wiring schematic video
By Sears PartsDirect staff

Learn how to decipher symbols so you can buy the right part for your problem.

January 20, 2015
How to fix a smelly room air conditioner
By Sears PartsDirect staff

Learn how to remove and prevent odors in a window air conditioner.