4 Common AC Maintenance Mistakes Homeowners Make

April 8, 2023
Two men working on an HVAC unit

Air conditioning units are a considerable investment, but the relief they offer from the blistering summer heat makes them worth the investment. However, it is essential to take care of your unit. You can expect about 20 years of use from your unit with regular air conditioner maintenance.

Unfortunately, many homeowners make mistakes with air conditioner maintenance that can lead to decreased efficiency and a shorter lifespan for their air conditioning unit.

To help you out, below are the four common air conditioner maintenance mistakes highlighted by HVAC contractors. By avoiding these, you can keep your air conditioner running without issue for years to come.

Ignoring Unusual Noises:

After spending a specific time with your air conditioning unit, you’ll become familiar with its normal operating noises. In many cases, unusual noises are an indication of a more severe issue developing within your air conditioner. For instance, shrieking noises may indicate that your air conditioner’s compressor is failing, while rattling noises may be a sign that something has come loose inside the unit.

If you ignore these noises and continue to run your air conditioner, you could end up causing severe damage to the unit – and incurring expensive repair bills as a result.

Not Changing the Air Filter:

Air conditioner maintenance isn’t just about the coils and fins outside the unit. You should regularly change the air filter. It tracks dust, pollen, and other particles that can clog the system. A dirty air filter will make your AC work harder than necessary, eventually leading to a complete system shutdown.

The rule of thumb is to change it every three months but check it monthly to be certain. All you have to do is remove the old filter and put a new one in its place. However, be careful with the sizing.

Failing to Repair Leaks:

Leaks are a prevalent problem with air conditioners. It could be a slow drip or a full-on gush, but you need to take care of it. The Freon gas that cools the air can be expensive, so you don’t want it leaking out.

Contact professional HVAC contractors immediately if you see any signs of a leak, such as a pool of water around the unit. They will be able to repair the leak and recharge your system. Please don’t attempt this yourself as you could worsen the problem.

Putting Regular Maintenance on the Backburner

Installing an air conditioner is just the beginning. You must also commit to regular air conditioning maintenance for your unit to work properly and efficiently. Examining thermostats, cleaning the condensate pump of any algae build-up, and ensuring the outdoor compressor is free of debris are all part of regular maintenance.

If you neglect these things, your air conditioner will have to work harder to do its job. It could eventually cost you more money in the long run. HVAC contractors can help you keep on top of regular maintenance so that you don’t have to worry about it.


Air conditioners are a sigh of relief during the hot days of summer. However, they can be a headache when they break down and need repair. Before you hose down your ducts in the hope of fixing the problem, take a step back.

Professional HVAC contractors like Carney & Son 72 Degrees, serving Isle of Palms, can help you troubleshoot the problem.

Whether you need help with air conditioner installation or air conditioner maintenance, our air conditioner experts are your answer.

Contact us today!

Carney & Son Air Conditioning and Heating

Carney & Son, 72 Degrees

We are a family Owned & Operated HVAC Services in Charleston, SC, proudly serving the Charleston community for 39 years.

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