Is your A/C keeping you awake at night? Has its constant clanging, banging, screeching, and hollering shaken your sanity?

You’re not alone, and you’re certainly not crazy. However, your air conditioner probably does need a tune up. Which is why we put together this blog post. Read on for practical, DIY fixes for when your A/C starts making strange noises.

Identifying Noises

Let’s start by getting a better sense of what’s wrong. First, we need to identify the specific noises your unit is making, since different sounds point to different issues.

Here’s what to listen for:

• Banging or Clanking
• Buzzing
• Squealing or Screeching
• Clicking
• Humming
• Rattling

These sounds can be hard to tell apart, but accurately identifying them is important to identify the issue. For example, constant buzzing might indicate problems with the motor or fan blades, while continuous clicking often signals electrical issues.

Understanding Air Conditioner Noises

Now that you know what to listen for, it’s time to address that irritating noise that’s driving you absolutely bonkers.

But before jumping in, remember these tips:

• ALWAYS turn off the A/C unit before inspecting it.
• Check your filter first! A dirty filter is a simple fix and common reason for irritating noises.
• Listen carefully. Identifying the noise and its source is essential to resolving the issue.
• If you’re uncomfortable with repairs, don’t hesitate to call Brea/ Orange County Plumbing Heating & Air Conditioning!

Banging or Clanking

Possible Causes: Loose or broken components, such as a connecting rod, piston pin, or crankshaft.

Solution: This often indicates a serious problem. Turn off the unit and contact one of our expert technicians at Brea/ Orange County Plumbing Heating & Air Conditioning for inspection and repair.

Buzzing

Possible Causes: Loose parts, debris in the unit, or issues with the motor or fan blades.

Solution:

1. Turn off the unit and check for visible debris around the fan blades or motor. Carefully remove any obstructions.
2. Check for loose parts, tightening any loose screws or bolts.
3. If the noise persists, contact one of our expert technicians.

Squealing or Screeching

Possible Causes: Worn-out belts, misaligned blower motor, or insufficient lubrication in the motor.

Solution: Turn off the unit and inspect the belts for wear. If they’re worn, they need replacing. If you feel confident, lubricate the motor following the manufacturer’s instructions. If the noise continues, schedule professional maintenance with an HVAC contractor at Brea/ Orange County Plumbing Heating & Air Conditioning.

Clicking

Possible Causes: Electrical issues, such as a failing thermostat or  faulty control panel.

Solution: First, replace the thermostat batteries and ensure it’s set correctly. If that doesn’t help, check for loose or frayed wires, but DO NOT attempt to fix electrical issues yourself. Have one of our HVAC technicians inspect the electrical components instead.

Humming

Possible Causes: Problems with the fan motor, capacitor, or electrical components.

Solution: Ensure the fan blades are not obstructed and can spin freely. If the blades are clear and the noise persists, call a professional to examine your A/C’s electrical components.

Rattling

Possible Causes: Loose screws, bolts, or panels, or debris trapped in the unit.

Solution: Turn off the unit and tighten any loose screws, bolts, or panels. Check for and remove any noticeable debris in or around the unit.

Conclusion

When in doubt, call a professional!

The expert technicians at Brea/Orange County Plumbing, Heating, and Air Conditioning are standing by and ready to help you. We’ve been serving LA and OC counties for over sixty years, so you can be assured that we have the expertise and tools to fix your A/C!

To schedule a service call, contact (714) 459-5673.