If you go to turn on your car’s A/C system and instead of a blast of cool air, you’re met with an unpleasant squealing sound. These may be signs that your A/C system needs attention. By understanding the common causes and knowing how to address them, you can restore your car’s cool comfort, save time, money, and prevent further damage.
Worn or Loose A/C Belt
A worn or loose AC belt is one of the most common causes for a squealing AC system. The AC belt is responsible for moving the air conditioning compressor, and over time, it can stretch, crack, and tear. The usual signs of a worn AC belt include a high-pitched squeal when the AC is turned on, and visible signs of wear and tear on the belt.
Failing Compressor Clutch
A falling compressor could be another cause for a squealing AC system. The compressor clutch engages the compressor when you activate the AC. If the compressor is faulty or failing, it may cause a squealing sound or reduced AC output.
Low Refrigerant Levels
If your vehicle has low refrigerant levels, it can put a heavy strain on your A/C system, causing it to work harder, which commonly leads to squealing noises from your A/C system.
Damaged or Worn Pulley Bearings
The car’s A/C system relies on pulleys to function properly. If the bearings inside the pulleys are damaged or worn, they can create a squealing noise or, in more severe cases, grinding and rattling sounds.
Contaminated or Worn Serpentine Belt
The serpentine belt is essential for multiple components in your car, including the AC system. Dirt, oil, or general wear can cause it to slip, leading to squealing. Keep an eye out for squealing noises when the AC or other accessories are in use, and check for visible dirt, oil, or wear on the belt.
Debris in the A/C system
Leaves, twigs, or dirt can sometimes find their way into your AC system, especially through the vents. The debris can interfere with the fan or other components, causing squealing noises and potentially reduced airflow from the vents.
Faulty Blower Motor or Fan
The blower motor and fan are responsible for circulating air through your car’s A/C system. If they are damaged or malfunctioning due to debris, it can produce a squealing or whining sound when adjusting the fan speed, and reduced airflow from the vents.
A/C Services in Puyallup
If you suspect an issue with your vehicle’s air conditioning system, or simply want to have it inspected to ensure it’s up to the summer heat, don’t hesitate to visit us! 15th Street Automotive in Puyallup has extensive experience in servicing the A/C systems on many makes and models. Give us a call or schedule online today!