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Is Your AC Making Some Strange Noises?

outdoor ac making noise

Your home’s AC maintenance is very important to keep your unit running well.  It can wear out and parts of it can break down. This may happen because your air conditioner has reached the end of its usable life and needs to be replaced, or it may happen because a single component has failed. In either case, there will be certain symptoms that manifest in the form of strange noises. If your ac is making noises. it may be time to call the pros!

AC Making Noises? Here Are Some Possible Causes

The kind of noise your air conditioner emits can indicate the nature of the damage and what type of air conditioning repair the unit needs. Grinding suggests a different set of issues from squeaking or squealing. Let’s take a look at some of the possible causes.

Causes of AC Squeaking

If your air conditioner is an older model, it may have a belt drive which might require preventive ac maintenance. Belt drives are notorious for slippage, which happens because the belts are loose and worn. The slippage can often cause a squeaking or squealing noise similar to the sound made by a car’s slipping serpentine belt. In some cases, it may even be best characterized as a kind of scream. The repair to prevent your ac making noise might be as simple as replacing the old belt with a new one. If you don’t replace the belt and keep running the air conditioner, you could be looking at serious repairs as the belt comes into contact with other parts within the air conditioner cabinet and causes damage. In the long haul, you should look at replacing a belt-drive air conditioner with something more modern.

  • Your air conditioner’s fan motor may also squeak because it needs lubrication. This is a relatively minor maintenance issue that you may be able to rectify yourself but you should still have a technician check it out in case there is a larger issue.
  • These noises can result from dirt and debris building up on the fan blades inside your air conditioner. Accumulated dirt on the fan blades unbalances the fan and causes it to squeak. If a buildup of dirt is the source of the HVAC unit squeaking noise, the solution will involve opening it up and cleaning it thoroughly.
  • Minor bends to the fan blade may cause unbalancing issues, which can cause it to squeak.

Causes of AC Making Grinding Noises

  • Abnormal HVAC unit grinding noises coming from any kind of machinery typically indicate metal on metal friction and that’s always a bad sign in any mechanical device. Two components are rubbing against each other when they shouldn’t and this means that there has already been a major failure or that one is on the way. When it comes to your air conditioner, the grinding noise is often a sign that bearings in the unit’s condenser fan motor are failing. This motor powers the fan that pulls hot air out of your home and pushes cool air in. Failed bearings can occur in newer air conditioners that have direct-drive systems instead of the belt drive system. If the bearings are failing, you could worsen the damage if you continue to run your air conditioner. Turn it off!
  • A direct drive air conditioner may also make a grinding noise if it needs to be lubricated.
  • If the grinding noise is coming from the compressor itself, it may indicate an issue with the pistons. Pistons are supposed to compress the refrigerant. In this case, it could mean that your compressor needs to be replaced or that you need a new air conditioner.

Yearly AC maintenance can prevent the issues that cause an ac making noises. Keeping your AC unit maintained may also help with utility costs.

Give us a call for air conditioning service in St. Lucie or Martin County, Florida, and speak with one of American Air Cares expert ac technicians. We are family-owned & operated, and our work is guaranteed. Schedule a service call today!


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The Careman American Air Care
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