Air Conditioner is Making Clicking Noises. What to Do?

Written by Chris

A peaceful summer with a silently working window air conditioner feels like pure bliss. Noises caused by window air conditioners are not only distracting but can indicate serious problems. There are a few reasons why your window air conditioner makes clicking noises. We will cover them all and provide troubleshooting tips as well.

Reasons Why Your Window Air Conditioner Making Clicking Noises?

Dirty filters

One of the common causes of the clicking sound of the window air conditioner is the settled dirt and debris on the blower motor. An imbalance of dust on one side of the motor causes a commotion as the fan moves.

How to fix the problem:

First, clean the filters using a vacuum or an air compressor; and
For thorough cleaning, soak the filter in warm water and vinegar mixture ( Ratio 50:50)and wash off dirt with pressurized hose water.

How to prevent it:

Ensure cleaning of filters regularly (quarterly, monthly, etc., depending on the use)

Make replacements if necessary

Compressor failure

The sound of compressor failure is accompanied by vibrations occasionally. The unsecured bolts or the flexible refrigerant tubing cause the compressor to fail and make clicking sounds.

How to fix the problem:

Tighten the bolts of the compressor;
Ensure cleaning of all the components; and
Call a professional if you witness any refrigerant leak.

How to prevent the problem:

Keep the compressor lubricated all the time.
Keep the suction lines clean
Keep the coil clean
Keep an eye on the wiring and replace the damaged wires

Loose screws

Your window air conditioner might make a clicking noise due to loosened screws caused by normal wear and tear.

How to fix the problem:

Check all the screws of the unit to ensure every single one is tight
Use a nut driver or a ratchet wrench to tighten loose screws

How to prevent it:

Keep an eye on the screws regularly while cleaning the unit
If the issue persists, schedule a repair service
Get your window unit replaced if it is not efficient anymore

Capacitor issues

A capacitor is a tiny cylindrical component that helps the compressor in the air conditioner turn on. In the event of a faulty capacitor, the air conditioner may frequently turn on and off. The reasons behind capacitor issues could be a defective control board, circuit breaker, or capacitor itself.

How to fix the problem:

At the breaker panel, switch off the power supply;
Remove the air conditioner panel to access the capacitator;
Check the capacitor for any change in shape;
Check and remember the way wires were connected to the old capacitator;
Remove the outdated capacitor;
Disconnect wires from the old capacitor and attach them to the new one. Do one wire at a time to avoid any confusion.