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Guide to Common AC Mistakes

A woman holding out her hand on the AC

Common AC Mistakes and Solutions

With summer approaching, everyone knows how crucial it is to have an air conditioner that works properly. Whether you own your home or not, we all know the benefits of having a functioning air conditioner that works with as few hiccups as possible.

But, did you know that some air conditioning problems may be caused by the homeowner?

Having an air conditioner is a huge benefit to keeping your home cool during the summer months, but if you’re having ongoing problems with it, here are a few common mistakes you could be making.

1. Forgetting to Change Your Air Filter

One of the most common mistakes you can make is forgetting to replace your air filter. Air filters are used to promote proper and healthy airflow throughout your home.

Your air conditioner can freeze over since the filter is blocked and can shut down. When you forget to change your filter, your air conditioner unit will work harder to put out air because of the filter being blocked. A blocked air filter can cause damage to your AC that can be fixed by a technician.


Switch your air filter frequently to avoid blockage and irreparable damage to your AC unit. Doing this can help expand your air conditioner’s lifespan.

2. Setting the Thermostat to the Wrong Temperature

Did you know that you can set your thermostat too low, too fast? During hot months you may find yourself attempting to cool down your home as quickly as possible by setting the temperature on your thermostat as low as you can.

Thermostats have an internal timer that slowly cools down your house, adjusting throughout the day based on the temperature you set it to. Doing this can also cause your energy bill to skyrocket.


Save money and your AC unit by following the recommended temperatures to 21°C to 25°C on your thermostat. Setting your thermostat to these temperatures will give your AC a chance to cool down gradually and also save on your energy bills.

3. Your AC Unit is the Wrong Size

We know you’re probably wondering how it’s possible to have the wrong size AC, but it’s common to mistakenly install a unit that is too small for the size of your home. Improper sizing can lead to energy efficiency issues and even AC dysfunction.


When installing a new AC unit, it’s always best to hire a professional technician to come to your home and measure for the right-sized unit, and suggest the best unit that will fit your home’s AC needs.

4. Ignoring a Problem

If you notice your AC isn’t working properly, like blowing warm air, making a strange noise, or it has a musty smell, those are all issues that can be bigger than you think. Ignoring these can shorten the lifespan of your AC and can end up causing you to need a replacement.


Try not to wait until small warning signs become a bigger issue. When you begin to notice that your AC isn’t working its best, you should call a professional to inspect it.

5. Avoiding Maintenance and Inspection

Not everyone is aware that air conditioners need to be inspected and maintained regularly, especially if problems arise. If you don’t get regular inspections and keep up ensuring your unit’s durability, it can increase your energy costs and you can run the risk of your unit completely shutting down.


It’s better to stay on top of making sure your air conditioner is functioning at its best, which can be done by letting an expert technician give an analysis and breakdown of your unit’s performance.

Contact the Experts at Centennial Plumbing, Heating, and Electrical

We understand that it’s easy to overlook common problems and mistakes with air conditioners. Leave the hard work for Centennial Plumbing, Heating & Electrical and give us a call today at (306) 500-7392 so we can help you with your AC repair and maintenance needs!