Window air conditioner error codes

Error Code

Sometimes your window air conditioner tells you exactly what's wrong—as long as you can crack the code. Below are common error code tables for the most popular brands, along with an explanation of what the code means, possible repair parts you might need and DIY advice. Visit Sears PartsDirect’s repair help section for more DIY advice onwindow air conditioners, major appliances, lawn and garden equipment, garage door openers, vacuum cleaners and more. To find the owner’s manual or a complete list of replacement parts for your window air conditioner, search for your model number.

Window Air Conditioner

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

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
 45 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 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 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 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.

February 1, 2018

Using a wiring schematic to trace a current video

By Sears PartsDirect staff

Find out what’s wrong with your appliance by following a circuit.

December 1, 2017

Wiring schematic symbols explained video

By Sears PartsDirect staff

Learn some of the most common symbols found in a wiring diagram and what they mean.