6 Types of Air Conditioner Noises & Ways to Fix Them

• Buzzing or Humming Noises

Buzzing or humming sounds emanating from your AC unit can indicate several possible problems, such as loose nuts and bolts, faulty fan motor bearings, or an electrical failure within the unit itself. To address these issues, try tightening any fasteners you loosen during installation, lubricating motor bearings with oil if needed, and checking fuses and circuit breakers in your breaker box if necessary.

• Clanking or Clattering Noises

Clanging, clattering, or banging noises are more common when your AC is first turned on after a long period without use. This is because parts that have expanded due to heat can cause metal pieces inside the unit to move against each other when cold air begins circulating again. To address this type of noise, you should check for loose screws and ensure filters are not blocking any internal airflow pathways in the unit.

• Squealing Noises

Squealing sounds typically occur when belts are slipping in the system, which puts added strain on the motor’s rotating componentry causing it to make a shrieking noise. To address this issue, you should inspect all belts connected to the fan motor and replace any that show signs of wear and tear. In addition, always keep extra belts handy just in case one break while you’re in the middle of a repair job!

• Screeching Noises

Screeching sounds signify something more severe than slipping belts—it is likely that your compressor has gone wrong and needs replacement immediately. Contact our professional HVAC technician as soon as possible if you suspect this problem, as ignoring it could lead to expensive repair bills down the line!

• Whirring Noises

Whirring noises are usually caused by debris getting stuck in fans near the AC’s exterior cooling coils or grilles. You should clean these components regularly and ensure nothing more significant than dust particles get caught up inside them. Excess debris can slow down fans, causing them to whir louder than usual when running at total capacity! Suppose cleaning doesn’t help reduce noise levels. In that case, it may mean replacing worn-out parts such as fan blades or even entire motors if necessary—but always consult with knowledgeable professionals before attempting any significant repairs on your behalf!

• Rattling Noises

Rattling noises could indicate something vibrating inside your AC unit, such as rustlings associated with worn-out fan blades coming into contact with each other due to age-related wear-and-tear over time—in this case, replacing fan motors are usually necessary. Speak with our HVAC technicians about what options might best fit your price range before making any final decisions on repairs!