Talking About Air Ventilation Systems

Diagnosing Simple Problems With Your Central Air Conditioning Unit Based On Noises

If you have noticed you air conditioner unit making strange noises, you first reaction may be to call a professional to take a look at it. However, there could be a simple problem with an easy solution you could do yourself. To save yourself money, use the following guide for diagnosing your central air conditioner.

Rattling Noises While The Unit Is Running

If you hear rattling noises while the unit is running, first check the outer casing of the unit. If a screw has become loose or has come out, the metal may be vibrating because it has become dislodged. Tighten any loose screws and replace any that are missing.

If you still hear the rattling after checking the screws, the second step is to check the fan inside the unit. If the center bolt is loose, the fan may not be rotating smoothly. This could cause the rattling sounds.

To check the fan's bolt, unplug the unit and remove the access panel on the side of the air conditioner. Locate the fan, then look for the center bolt. Hold one of the fan blades with one hand and use a wrench to hand-tighten the bolt. Replace the access panel, plug in the unit, and turn it on.

If you still hear the rattling noises, this could be an indicator that the compressor has a problem. If this is the case, you may want to have it checked out by a professional.

Hissing Or Whistling Sounds When The Air Is Blowing

While the unit is on and blowing air in the system, you may hear a hissing or whistling sound. This could be a sign that the attached duct has become slightly dislodged, causing air to blow through a small opening. 

First, check the screws attaching the duct to the unit to see if they are loose. If they are, hand-tighten them with a screwdriver.

Once the screws are tightened, look for spaces between the duct and port. If you still see openings, wrap the joint with duct tape. If you continue to hear the noises, this could be a sign that one of the hoses inside has sprung a leak. This should be looked at and replaced by a professional HVAC repair service.

While the above noises may have simple solutions, clanking or loud bangs could be an indicator of something more serious. If you hear these noises, you may want to contact an HVAC contractor about having your air conditioner inspected. If any major issues are found, you can then discuss your options for either having the air conditioning repaired or replaced.