What’s That Noise from My Air Conditioner?

Is Your AC Unit Making Weird Sounds? Here’s What You Should Know About AC Repair

Hearing strange noises from your air conditioner is never a good sign. But what do those noises mean? Different sounds coming from your AC can signify different problems, so in this post, we’ll discuss what to do based on what you hear and when it’s time to call for AC repair!

Why Is My AC Making a Chirping Noise?

Chirping noises usually indicate that the bearings are dry, the fan is rubbing against the coils or blower cage, or the belt needs to be replaced. Chirping is the least serious air conditioner noise, so if you hear it, let your system run and see if it quiets down or if the noises become less frequent. If the noise gets louder or turns into more of a squeal, turn off your unit and call Michael Bonsby HVAC, Plumbing & Electrical right away — you might have a much bigger problem.

Why Is My AC Making a Squealing Noise?

Squealing noises indicate the same problems as chirping noises, but typically to a much more severe degree. They often signal that the fan is getting ready to burn out, so call Michael Bonsby HVAC, Plumbing & Electrical to correct the issue before it causes your whole system to break down.

Why Is My AC Making a Growling Noise?

Growling noises are not a good sign — they often mean your compressor is dying. Turn it off and call Michael Bonsby right away so we can determine if it can be fixed or if you’ll need air conditioner replacement.

Why Is My AC Making a Rattling Noise?

Rattling noises can be caused by several things, including:

• A loose fan or worn-out motor
• A fan that’s off-balance, usually caused by a bent fan blade
• A loose belt
• A loose panel or a panel that hasn’t been properly replaced
• Old age

A little rattling is usually OK, but call our technicians if it gets louder or sounds like something is really off.

Why Is My AC Making a Knocking Noise? When it’s Time for AC Repair

Like rattling noises, knocking noises can signify a few things wrong with your system. The most common include:

• A broken or worn-out compressor
• Improper refrigerant pressures
• A stuck valve somewhere in your refrigerant system
• A loose compressor

If you’re not sure what’s going on, call the pros at Michael Bonsby HVAC, Plumbing & Electrical for AC repair service! The expert Gaithersburg HVAC technicians at Michael Bonsby HVAC, Plumbing & Electrical can diagnose and repair just about any air conditioner problem you may have. If you’re hearing strange noises coming from your system, don’t hesitate to contact us! We offer air conditioner repair and air conditioner replacement services and provide free estimates on all repairs in the Washington DC area

AC Repair FAQs

What kinds of noises indicate I need professional AC repair?

Some sounds are warning signs that your system needs AC repair, such as loud squealing, grinding, growling, banging, or persistent rattling. These often point to failing parts like a motor, compressor, or loose components.

What should I look for when hiring an AC repair technician for noise diagnostics?

Seek licensed, insured professionals; check reviews and references; ask about experience diagnosing noisy systems; and ensure they provide a detailed diagnosis and cost estimate before performing major repair work.

What causes my AC to squeal or chirp, and can repair fix it?

Squealing or chirping often comes from worn belts, dry bearings, or fan blades rubbing against housing. In many cases, a technician can perform AC repair by lubricating, tightening, or replacing the worn parts.

How much does AC repair cost for noise-related issues?

Costs vary depending on the problem (belt replacement, motor repair, compressor work, etc.). Simple fixes may be relatively inexpensive, while major repairs (like compressor replacement) are more costly. Always get a written estimate from your AC repair provider.