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Sounds That Signal Needed AC Repairs (Guide for Homeowners)

September 24, 2022

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Have you been putting off needed AC repair for your home’s HVAC system? If so, it’s time to make that call! The longer you ignore broken or worn parts, the worse that damage becomes. Consequently, you might face some repair costs that you could have avoided if you had called a contractor sooner.

On the other hand, some homeowners put off needed fixes because they don’t realize the appliance needs repairs. In some cases, an AC might continue to run even when damaged! In turn, homeowners don’t realize a part is faulty or failing. To ensure your HVAC system always functions properly, check out a few sounds that signal needed AC repairs.

What does a broken AC unit sound like?

There are many sounds that might indicate it’s time to call an AC repair contractor near you! Note just a few of those so you can know when your home’s HVAC system needs fixing.

  • Banging, thumping, and grinding noises often indicate a broken part. As parts break and come loose, they might bang around the inside of a compressor. Also, a broken part stuck somewhere in the appliance might create a grinding sound.
  • Additionally, loose ductwork in the home might create a banging sound as air passes through it.
  • Bearings allow rotating parts to move freely. As they wear down, these parts often create a high-pitched squeal. Squealing can also signal a worn or damaged belt.
  • Air conditioner refrigerant leaks are rare; however, refrigerant leaking through damaged hoses might create a hissing sound.

A worn-out blower or motor, frayed wiring, and other issues can also make odd or unexpected noises. Consequently, it’s good to call a repair contractor if your home’s air conditioner starts creating any unusual sounds!

ac unit making strange noises

What are normal AC sounds?

Not all sounds from your home’s air conditioner indicate needed repairs! For instance, as the motor and blower engage, you might hear a whooshing sound around the home’s vents. Air being pulled into the system and then circulated through the home can often create this noise.

Additionally, remember that air conditioners have lots of moving parts. In turn, you might hear humming or slight rattling sounds as the appliance cycles on. These sounds are often louder the closer you are to vents or the outside compressor.

What is that loud knocking sound coming from my AC?

A loud knocking sound from your home’s air conditioner often indicates needed repairs. A part might have broken off and is now “knocking around” the inside or outside of the appliance. Also, a foreign object caught in the appliance can also create a knocking or banging sound.

Additionally, a compressor unit coming loose from its base or footing can move around as it operates. This can also create a knocking, banging, or scraping sound. Whatever the case, don’t overlook this noise! The longer you ignore these sounds, the more extensive and expensive that damage becomes.

How do I know if my AC is damaged?

In addition to odd and loud sounds, there are many signs of an air conditioner needing repairs! Call an experienced contractor near you if you notice any of these issues with your appliance:

  • Burning smells might indicate a broken and stuck part inside the appliance. Also, worn wires might create a burning or charred smell.
  • If your appliance cools your home unevenly, it’s time to call a repair contractor. As an appliance struggles to operate, it might not push cool air through all vents in the home. Additionally, a refrigerant leak might mean ineffective or uneven cooling.
  • A damaged thermostat or wiring between the thermostat and appliance can interrupt signals between them. In turn, an air conditioner might continue to run long after it cools a space. On the other hand, it might not run long enough to reach your desired temperature.
  • Damaged thermostats or air conditioners might also cycle off too quickly to remove humidity from the home. Consequently, interior spaces might feel cool but clammy.
  • Additionally, keep your eyes on monthly utility bills. A damaged air conditioner struggling to work properly often needs more power to work. In turn, you might see your electric bills spike as the AC breaks down.

ac repair technician

Should you repair or replace an AC?

If your air conditioner needs repairs, you might consider this an opportunity to replace the unit! First, note its age and remember that older appliances are likely to break down completely in the next few years. Second, consider if the unit offers sufficient cooling for your home, or if it’s time for a larger AC.

Also, an older air conditioner might not run as efficiently as it should. In turn, it might be drawing more power than necessary every time it cycles on! On the other hand, a newer appliance might run more efficiently, offering better cooling with lower utility costs. Also, you won’t need to worry about unnecessary pollution generated from that added power being drawn.

Moreover, consider if you might put your home on the real estate market in a few years. An older, worn-out appliance might lower its value or desirability. On the other hand, replacing the appliance now can mean a quality HVAC system when you’re ready to sell. In turn, your home might appeal to more buyers and fetch a higher asking price than with the older AC.

Lastly, remember that manufacturers sometimes discontinue making parts for older model appliances. In a few years, you might not be able to find replacement parts for an outdated air conditioner. Replacing it now can then mean a functioning appliance for years to come.

Rhode Island HVAC Services is happy to provide this information about AC repair to our readers. Hopefully, you found it helpful and useful! If you know it’s time for air conditioning fixes, call our Rhode Island AC repair contractors. We offer expert, guaranteed services and convenient appointments. Additionally, we only use the highest-quality parts for replacement. To find out more or to schedule a convenient service call, use our contact form or just call us today.


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