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8 Common Air Conditioning Mistakes Homeowners Should Avoid

You rely on your air conditioner to keep your home comfortable throughout the year.

Even a minor mistake can have a big impact on your air conditioner’s performance, your home comfort, and the running costs.

That’s why it’s important to know the most common air conditioning mistakes that homeowners make and how to avoid them.

So, are you making any of these air conditioning mistakes?

1) Is your air conditioning unit the correct size for your home?

If your air conditioning unit is too small for your home, it will not have enough cooling power.

HVAC professionals will measure your house and make sure you get the correct size air conditioner, so dom

An oversized air conditioner will continually cycle off and on, causing uncomfortable changes in temperature and unnecessary wear and tear on your system.

A qualified HVAC contractor can help you determine the correct size air conditioner for your home.

2) Is your outdoor unit positioned correctly?

The position of your outdoor air conditioning unit makes a big difference in terms of its energy use.

Installing your unit in direct sunlight causes it to work harder to keep your home cool, so your air conditioner should be positioned in the shade to maximize its energy efficiency.

The indoor thermostat should be placed away from any sources of heat, such as windows that let in warm sunlight.

3) Do you always leave your air conditioner running?

Leaving your air conditioner running 24/7 will cool your home, but will also waste energy.

Turn your thermostat up when you are going to be away from home, as it will not take long to cool back down after you return.

Most thermostats come with a programmable schedule, so use this to your advantage to save money!

A programmable thermostat is an even better way to manage your cooling needs, because you will not have to remember to adjust the temperature every day. You can “set it and forget it.”

Program it to turn your air conditioner off when you are away from home, and turn it on just before you return.  

With a “smart” thermostat, you can even adjust the temperature from your phone.

It’s a smart investment that can also save you up to 10% on your cooling costs every year.  

4) Do you change your air filters regularly?

Dirty filters create poor indoor air quality, which can lead to health problems.

Changing your air filters is an easy task to overlook, but it’s an essential part of maintaining your air conditioning system, and neglecting your filters can also lead to higher energy bills.

Replacing a clogged air filter can improve your air conditioner’s energy use, so change your air conditioner filters once a month.

5) Do you use ceiling fans?

Ceiling fans keep the air circulating throughout your home and mean your AC doesn’t have to work as hard.

In warm weather, ensure your ceiling fans are spinning counterclockwise to promote the best airflow, and remember to close your curtains and blinds to block the sun’s heat.

6) Do you leave your windows open?

Opening your windows lets warm air enter your home from outside, and lets cold air escape.

Your air conditioner will work harder and waste energy.

If you’re using your air conditioner, remember to keep your windows closed.

7) Have you scheduled an annual air conditioning service?

Your air conditioner needs routine maintenance to keep it running at optimal levels.

Have your system inspected to address potential problems before more costly repairs are needed. You should get your AC system serviced each year to ensure it’s performing at its best.     


Want to see if you can make your air conditioning more efficient and effective? Simply Contact Us at (651) 294-7798 today and tell us how we can help you.

Schedule a HVAC repair anywhere in the Minneapolis or St. Paul area today by calling (651) 294-7798 or by requesting an estimate online.


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1220 Cope Avenue East, Maplewood, MN 55109