Window air conditioner articles

These articles from Sears PartsDirect can help you get the most efficient and best cooling performance from your window air conditioner. From finding answers to common questions to fixing a smelly window unit, we can help. Check out our DIY window air conditioner repair help section for more troubleshooting guidance and step-by-step repair instructions.

Window Air Conditioners

Articles and videos common to all window air conditioners

September 26, 2019
Protect your smart appliances from hackers with these steps.

Find out how to protect your smart appliances from malevolent invasions by hackers.

February 25, 2018
What to check when your air conditioner won't turn on,

Try these easy fixes if your central AC won't start.

February 15, 2018
How to maintain your HVAC system.

6 ways to extend the life of your HVAC system.

October 26, 2016
How to repair broken or damaged wires.

Learn how to repair broken, frayed or damaged wires in your appliances.

April 15, 2016
How to maintain your window air conditioner.

These simple maintenance tips help your window air conditioner keep its cool.

February 23, 2016
What to check if your air conditioner isn't cooling.

If your central air conditioner isn't cooling as it should, we'll show you how to check for a tripped float switch and clogs in the drain pipe.

January 18, 2016
How to use a multimeter to test electrical parts.

Learn how to use a multimeter to check for wiring problems in an appliance that's not working

December 16, 2015
Using a wiring schematic to trace a current.

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

December 9, 2015
How to read a wiring schematic.

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

December 2, 2015
Wiring schematic symbols explained.

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

January 20, 2015
How to fix a smelly room air conditioner.

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

January 6, 2015
Troubleshooting a leaking room air conditioner

Learn why water leaks from a room air conditioners and how to fix it.

December 22, 2014
Room air conditioner installation and operation tips.

Window air conditioner installation tips.

December 22, 2014
How to figure out which room air conditioner you need

Grab your calculator and punch in these numbers to figure out how many BTUs your room AC needs to keep you cool.

November 1, 2014
Window air conditioner common questions

Browse this list of questions we hear from our Sears PartsDirect customers most frequently, to see if we have the answer to your question.

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
 45 minutes or less
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