Common Air Conditioner Problems & Solutions |
Shop All Air Conditioners

Common Air Conditioner Problems & Solutions

Air conditioner in window A window air conditioner can provide the much-needed relief you need when the temperature rises, especially in homes without central air. To ensure you stay cool all summer long, it’s important to know how to troubleshoot some common air conditioner problems. You may not be able to fix every problem, but this will give you an idea if you should repair the unit or purchase a new one.

My air conditioner won’t turn on.

The first thing to do if your A/C won't turn on is to check for power. Is the air conditioner plugged in? If so, test the outlet by plugging something else into it. If the outlet is receiving no power, check your circuit breaker.

If the A/C is receiving power but still doesn’t turn on, there are a number of issues that could be wrong and would require repair, including the wiring, thermostat, compressor, selector switch, or control board.

Checking a dirty air conditioner filterMy A/C is not cooling enough.

"Why is my air conditioner not cooling the house?" is a common complaint, and it's the reason to make sure you purchase the right BTU size air conditioner for the space you are trying to cool. Use our handy BTU calculator to make sure you've got the right air conditioner for your space. You may need a new air conditioner with more BTUs to get the job done.

If you have the right size air conditioner, use a thermometer to get the temperature of the room and compare that to the temperature you want it to be.  If there is a 15 degree difference you may be asking the unit to do more than it's capable of. Try resetting the temperature to 10 degrees lower than the room temperature.

If the difference with the thermometer is less than 15 degrees, check the air damper. If it's open, it will bring in outside air, which is bad for the unit’s efficiency. Be sure to also check your back cover; many people forget to remove this cover after the winter season.

Lastly, check the condensing coils, which are located on the warm end of the A/C unit. Remove the air conditioner cover to access the coils and clean them with a soft brush.

My A/C is not blowing cold air.

If your air conditioner is working but not cooling, first make sure the thermostat is set appropriately. Next, check the compressor motor, which is a small case inside the air conditioner. If it is humming continuously, it could be the condenser, evaporator or compressor, all of which would need service from a professional.

My air conditioner is leaking water.

If you find your A/C unit is leaking water, this could be a sign that it wasn’t installed properly. Re-check the manual’s installation instructions to be sure the installation was done correctly. A window air conditioner that's leaking water most likely just needs to be tilted back slightly to allow water to run off.


If you have consistent problems with your A/C unit and you have gone through all the troubleshooting steps, the unit may need service from a professional or it may just be time for an upgrade. An average window air conditioner has a life span of 8 years, and this varies depending on how often it is used and how well you maintain the unit. If you've decided to purchase a new air conditioner, P.C. Richard & Son is the place to find it! Our amazing selection of window, wall, and portable air conditioners includes today's most trusted brand names at the guaranteed lowest prices. Find the perfect A/C for your home – shop P.C. Richard & Son today!

Related Content
Air Conditioner Installation: True Wall Fit

Air Conditioner Installation: True Wall Fit

Do you have a thick wall that’s greater than the standard construction size? Learn how a true wall fit air conditioner is a great solution in this video.
Air Conditioners: Through the Wall Installation

Air Conditioners: Through the Wall Installation

There are many things to consider when installing a through-the-wall air conditioner.
How to Calculate the BTU for Your Room Air Conditioner

How to Calculate the BTU for Your Room Air Conditioner

Need an air conditioner, but not sure what size is the right size? This video covers helpful tips on how to determine the proper BTU size.
Close Navigation
just a moment...