5 AC Noises You Should Never Ignore
- markandadvert2010
- Jul 14
- 2 min read
This usually means a part inside your unit is loose or broken. Think: a blower motor out of balance, or a loose piston pin. If you hear loud banging, turn off the system immediately to prevent further damage.
🛑 What to do: Call a licensed HVAC tech in Whittier — like CD HVAC — before it turns into a full system failure.
2. Screeching or Squealing
A high-pitched squeal can mean a fan belt is worn out or a motor bearing is failing. If ignored, it could cause your motor to burn out entirely.
🔧 Quick fix: Sometimes a belt replacement. But you won’t know until a pro checks it.
3. Buzzing or Electrical Zapping
Buzzing is often an electrical issue, like loose wiring or a failing capacitor. Not only can this stop your system from working, it’s also a fire hazard.
⚡️ Warning: Electrical problems should always be handled by certified technicians.
4. Hissing or Whistling
This can signal a refrigerant leak, duct leak, or pressure issue in the system. In Whittier’s dry heat, a refrigerant leak can leave your home uncomfortable fast.
❄️ Did you know? Low refrigerant can damage your compressor — the heart of your AC.
5. Clicking (That Won’t Stop)
Clicking at startup is normal. But constant clicking? That’s often a thermostat problem or faulty control.
🤖 Pro tip: A faulty thermostat can make your system short-cycle and wear out faster.
🌡 Why It’s Even More Important in Whittier, CA
Whittier summers can get hot and dry, and AC systems here work overtime. A small noise can quickly become a big issue — especially in older homes with aging ductwork or neglected systems. Fast action protects your comfort, your investment, and your energy bill.
👷♂️ Why Choose CD HVAC?
✅ Family-owned in Los Angeles for 20+ years
✅ Licensed, insured, and trusted across Whittier
✅ Fast response, honest assessments, and no upsell pressure
✅ We fix it right — the first time.
📞 Hear Something Weird? Let’s Check It Out.
Don't wait until your AC stops working completely. If your air conditioner is making any of these noises, give us a call. We'll inspect the system, give you a clear diagnosis, and recommend the smartest next step — repair or replacement.
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