Window Air Conditioner

A window air conditioner is a self-contained cooling unit designed to fit snugly into a standard window frame, offering an affordable way to beat the heat in individual rooms. From selecting the right BTU capacity for your space to proper installation and seasonal maintenance, there's a lot to consider. Angi helps you find the right pros and resources to keep your home cool and comfortable.

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Common Window Air Conditioner Service Questions

DIY is possible with the proper tools. Professional installation ensures a secure fit and efficient operation.

While personal preferences widely vary, sleep experts say the best temperature for sleeping is between 60 and 67 degrees Fahrenheit rather than 78. If you do choose to sleep with your AC unit tuned to 78 degrees, you might want to use only a sheet or light blanket rather than a comforter. You might also consider installing a window unit in your bedroom so that you can be cooler in bed without wasting energy cooling the whole house.

A window AC unit is not completely silent. You’ll hear the sound of air blowing, and if you put your ear right up next to the unit, you may hear a slight hiss or gurgle as the refrigerant flows through the system. That said, if your system is making a running water sound, a loud banging sound, a grinding sound, or physically vibrating, you may be facing an issue or malfunction with your AC unit.

Not only do window units require venting to the outdoors, but the same goes for every type of air conditioner. Heated air has to go somewhere and if you vent anywhere but the outside, you are basically wasting money as your home will heat over time and not cool down. Portable AC units feature a tube that connects to the outside and central units include ducts.

To make the most out of your AC, consider implementing the following best practices: 

  • Choose the right size AC for your home to ensure your unit runs as efficiently as possible.

  • Choose a window with shade, as direct sunlight can cause your AC unit to overheat. 

  • Clean or replace the filter at least every two months. 

  • Inspect the AC’s fan and straighten it if necessary. 

  • Discontinue use immediately if you suspect a malfunction, as running the AC while broken can lead to significant issues. 

  • Turn off (or adjust the temperature) when you leave the house.