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Meyers Heating & Air Conditioning Blog

Is Your AC Making These Concerning Noises?

Have you ever heard an unusual noise in your home and wondered where it was coming from? If you’re ever able to pinpoint your air conditioner as the source of a loud or alarming sound, you should give us a call right away. We’re the experts when it comes to services for HVAC in Longmont.

No matter what unusual noise you hear, we can help. We’ve heard it all and we’ve seen it all. Of course, each air conditioner problem is unique, but we can still get down to the root of the problem, fix it, and prevent it from happening again. Keep reading to learn more about problematic sounds and why you need to call us if you hear them coming from your air conditioner.


If you have an older air conditioner, it uses belts for some of its operation. If these belts slip out of place, they can produce a squealing sound. If you have a newer air conditioner, they can use bearings in place of a belt system. These bearings can also produce a squealing sound if they are not properly lubricated.

Thankfully, hearing a squealing sound from your air conditioner is not the worst thing that could happen. If you address the problem early, it’s usually as easy as putting a belt back in place or lubricating bearings. Keep in mind that if you ignore the sound, it could worsen and cause damage to spread throughout your air conditioning system.


If you ever hear a grinding sound come from your AC, turn it off immediately and give us a call. When you hear grinding, there is a good chance that something is wrong with the motor. Allowing the grinding to continue could burn the motor out and cause even more problems. Then instead of a repair, you’re facing a replacement which is much more expensive.


The ductwork in your air conditioner is made of thin pieces of metal. When the air blows through these ducts, you may hear a gentle rattling sound. This usually happens when the ducts expand and contract because of fluctuations in temperature. While it’s OK to hear rattling occasionally, you should not hear it constantly, or even frequently.

If you begin to hear rattling too often, there’s a chance that something is wrong with your ductwork. Our team may need to come out and adjust or re-secure your ductwork so that it stops rattling. If you allow rattling to go on, seals could break and your ductwork could shift around and cause airflow problems.


When you hear a tapping sound, it is generally a sign that some small loose part is loose and grazing against a side as your AC runs. An example of this may be a fan blade that is slightly bent or a screw or bolt that is loose. If the tapping turns into a knocking sound, that could mean a bigger problem. A louder and more obnoxious sound means that a larger component is loose. 

Contact Meyers Heating & Air Conditioning today to schedule an appointment with our professionals.

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