What to Do If Your Air Conditioner is Not Cooling Your Space


Check and reset the switch from “Fan” to “Automatic.”

Replace the dirty filter.

Remove the return-air filter and, if you can’t see what’s on the other side, replace it.

If you see a clog, carefully clear it out with the end of a small screwdriver or similar narrow item.

Try to diagnose duct malfunctions.

If you have an unfinished basement, you can examine the ductwork to see if a joint has come loose.

For peak functionality, don’t place anything on top of the compressor.

If you don’t feel comfortable opening the AC units you can ask a pro to clean them.

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