Air ConditionerMaking Noise
Air conditioner noise diagnosis and repair in the Las Vegas valley.
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- Locally owned since 2006
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What to Check
Common Sounds andWhat They Mean
Different sounds point to different problems. Look and listen for these common issues without opening any access panels.
Screeching or Squealing
High-pitched squeals often point to a failing blower motor bearing or a worn belt on older units. This requires replacing the damaged part.
Buzzing at the Unit
A loud buzzing from the outdoor unit can indicate a failing contactor or a dying capacitor that is struggling to start the compressor.
Rattling or Banging
Loose hardware, a broken fan blade or debris inside the outdoor unit can cause severe rattling. Turn the system off to avoid damage.
Clicking When Starting
Repeated clicking usually means an electrical relay is failing. If the compressor does not start, the capacitor may be dead.
Hissing Near the Coil
A hissing sound can point to a refrigerant leak. This needs a technician, and only EPA Section 608 certified technicians handle refrigerant.
Whistling from Vents
A whistling sound at your vents indicates restricted airflow. Check your filter and ensure no furniture is blocking the return grilles.
Safe Self Check
Four Steps toIsolate the Sound
Try these simple steps to safely identify where the noise is coming from before calling for a repair.
Find the Source
Determine if the sound is coming from the outdoor unit, the indoor air handler in your attic, garage or hall closet, or the vents in your rooms.
Check the Vents
If you hear a whistling sound, ensure all supply and return vents are open. Move any rugs or furniture that might be blocking airflow.
Inspect the Filter
A clogged air filter can cause the blower motor to strain and become noisy. Replace the filter if it is covered in dust.
Look at the Outdoor Unit
Look through the grilles on your outdoor unit. If you see a stick or debris touching the fan blade, do not reach in. Call for service.
When to Turn It Off
If you hear loud banging, grinding or screeching, turn your air conditioner off at the thermostat immediately. Running a system with a broken fan blade or failing motor can damage the compressor. Leave it off and call us for an inspection. If you smell gas at any point, leave the home right away without touching light switches or the thermostat, then call 911 and Southwest Gas from a safe place outside.
Our Approach
What to Expect on Your Service Call
We track down the source of the noise and give you options to fix it.
Find the Cause: We listen to the system and inspect the motors, fan blades and electrical relays to find the source of the noise.
Show What Failed: We show you the worn bearing, failing capacitor or loose hardware causing the sound.
Written Price: You get a written flat-rate price for the repair before we start work. The price does not change once approved.
Repair and Test: After replacing the faulty part, we run the system to ensure the noise is gone and the cooling cycle is normal.
Common Questions
Frequently Asked Questions
Here are the most common questions we get about air conditioner noises in Las Vegas.
Is a buzzing outdoor unit dangerous?
A loud buzz usually points to an electrical issue, like a failing contactor or capacitor. It is not necessarily dangerous, but it means a part is struggling. Continuing to run it can damage the compressor.
Why does my air conditioner squeal when it starts?
A high-pitched squeal is typically a dry or worn bearing in the blower motor or outdoor fan motor. Most modern motors have sealed bearings that cannot be oiled, so the motor usually needs to be replaced before it fails completely.
What causes a banging sound outside?
Banging or clanking often means a part has come loose. A fan blade might be hitting the metal cage, or the compressor mounts may have broken. Turn the system off right away to prevent severe damage.
Should I hear a hissing noise?
A light hiss right when the system turns off is normal pressure equalizing. A constant hissing while running can indicate a refrigerant leak or a severe duct leak.
Can a dirty filter cause strange noises?
Yes. A clogged filter starves the system of air. This can cause a loud whistling sound as air squeezes through tiny gaps, and it makes the blower motor strain and hum louder than normal.
Silence YourNoisy System
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