Why Is Your AC Making a Rattling Noise in Millwood, NY?

Summers in Millwood are usually mild, but we get the occasional hot day that sends you scrambling to crank up the AC. On one such day, you turn on the air conditioner only for it to surprise you with a loud rattling racket. Why is your AC making a rattling noise, and how can you fix it?

Below, learn the top causes of a noisy air conditioner, then call us for AC services in Millwood, NY.

Common Reasons Why Your AC Is Making a Rattling Noise in Millwood, New York

Your air conditioner should only hum softly, so when it starts making a rattling noise, it’s a cause for concern. Rattling sounds can have many causes, from faulty AC components to debris stuck in the outdoor unit. Let’s take a look at the top causes of that rattling sound and what to do about them.

Debris in the AC Unit

If you look at the front of your outdoor air conditioning unit, you’ll see a grille with dozens of small openings. These openings provide necessary ventilation and create the perfect entry points for all kinds of debris, including rocks, mud, seeds, and plant growth. Should any of this debris end up inside your unit, you might hear a telltale rattling noise.

A bit of debris in the unit isn’t a serious problem, but it’s important to remove it promptly before it builds up and causes damage. To clean the unit, spray the grille with a garden hose and cut back any nearby plants. The condenser fins inside the unit might need cleaning as well. It’s best to have an HVAC pro do this for you to avoid damaging the fins.

A Loose Cover on the Outdoor Unit

Have you recently opened the panel on the outdoor unit, perhaps to repair or clean it? If so, you may not have screwed the cover back on correctly. A loose cover can make a loud rattling noise.

If this is the source of the racket, you can easily fix it yourself. Simply use a screwdriver to tighten the screws around the panel. If the rattling noise persists even after tightening the screws, you’ll need to call an HVAC technician to locate the source of the problem.

Loose Parts in Your AC

Your air conditioner goes through a lot of wear and tear, and over time, its components can become loose and start wobbling. When that happens, you might hear a rattling, banging, or grinding sound.

Screws commonly come loose inside cooling units and bounce around from the movement of the machinery. While loose screws aren’t an emergency, they can eventually damage your system if left alone. So, make the right choice and call us for air conditioning service.

A Broken AC Fan

Why is your AC making a rattling noise? A faulty fan may be to blame for the racket.

Your air conditioner fan has the important job of pushing air across the condenser coil. If the fan’s blades become unbalanced, it will wobble as it rotates, causing it to scrape against other components inside the unit. Several things can cause a fan to become unbalanced, from rocks falling into the unit to typical wear and tear.

Is fan replacement a DIY project? Although it’s possible to replace the fan yourself if you’re handy, you’re better off calling a pro. During fan replacement, the technician can also check to see if the fan’s motor shaft is in good shape.

A Faulty Motor

Your air conditioner contains a motor that provides power to the fan. Inside the motor are bearings, which can become worn out or damaged due to a lack of maintenance or debris falling into the unit. If your fan motor becomes damaged, you may hear a rattling or whining noise.

If this is your problem, you’ll have to call an HVAC pro for repairs, as replacing the fan motor definitely isn’t a project most homeowners can handle themselves.