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AC Making Strange Noises

Unusual sounds from your AC? Different noises indicate different problems. Find out what yours means.

Common Symptoms

If you're experiencing any of these symptoms, you may have this problem:

Grinding or scraping sounds
Squealing or screeching noise
Banging or clanking sounds
Buzzing or humming noise
Clicking sounds that don't stop

Possible Causes & Solutions

Loose Fan Blade

Pro Required

Professional inspection and tightening required

Worn Belt

Pro Required

Belt replacement needed

Failing Motor Bearings

Pro Required

Motor repair or replacement required

Loose Components

Pro Required

Professional inspection and tightening

Compressor Issues

Pro Required

Professional diagnosis needed, may need replacement

Debris in Unit

DIY Possible

Clear debris from around outdoor unit

When to Call a Professional

While some issues have DIY solutions, HVAC systems are complex. Call a professional when:

  • DIY solutions don't resolve the problem
  • The issue involves electrical components
  • You smell gas or burning odors
  • The problem returns after temporary fixes
  • Your system is under warranty (DIY repairs may void it)
Call San Jose HVAC Pros: (650) 397-7060

Related Services

AC Repair

Expert diagnosis and repair for all AC makes and models

$89-$500+

Frequently Asked Questions

Why is my AC blowing warm air?

Common causes include low refrigerant, a dirty air filter, frozen evaporator coils, or a faulty compressor. Our technicians can diagnose the exact issue.

How much does AC repair typically cost?

AC repairs typically range from $89-$500+ depending on the issue. We provide upfront pricing before any work begins so there are no surprises.

Should I repair or replace my AC unit?

Generally, if your unit is over 10-15 years old and repairs exceed 50% of replacement cost, replacement is often more economical in the long run.

How long does an AC repair take?

Most common repairs are completed in 1-2 hours. More complex issues or those requiring parts may take longer, but we always communicate timelines clearly.

Related Problems

AC Not Cooling

Is your air conditioner running but not cooling your home? Learn the common causes and solutions.

AC Won't Start

Air conditioner won't turn on at all? Here are the common reasons and what to do.

AC Water Leak

Water pooling around your AC unit? This could cause water damage. Learn why it happens.

Need Help With Noisy AC?

San Jose HVAC Pros technicians are ready to diagnose and fix your problem

Call Now: (650) 397-7060 Schedule Service
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