Car AC Squealing Noise
A squealing or high-pitched whistling sound when the car AC is turned on or when the engine starts. The noise usually comes from the engine area.
Possible Causes
Worn or Loose AC Belt
High likelihoodA worn or loose belt slips on pulleys, creating a squealing sound.
Worn Compressor Bearing
Medium likelihoodThe compressor pulley bearing is worn and needs replacement.
How to Diagnose?
- 1 Open hood and turn AC on to locate noise source
- 2 Visually inspect belt for cracks and wear
- 3 Spray water on belt while running (if noise stops, belt is the cause)
- 4 Hand-spin compressor pulley to check for smooth rotation
Repair Cost
Depends on cause and vehicle type
| Service | Price | Notes |
|---|---|---|
| Estimated Repair Cost | 50–500SAR | Depends on cause and vehicle type |
* Prices are estimates and may vary depending on vehicle type and condition. Contact us for an accurate quote.
Frequently Asked Questions
Squealing only when AC turns on, what is the fix?
Usually the AC belt is the cause. Replace it if cracked, or tighten it if loose. If the noise persists, the bearing needs inspection.
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The car AC has completely stopped working. The compressor does not engage and no cold air comes from the vents.
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The AC belt (serpentine belt) transfers power from the engine to the AC compressor. It wears over time and needs periodic replacement.
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The compressor bearing allows the compressor pulley to spin smoothly. Its failure causes annoying squealing noises and can lead to complete compressor failure.
Read moreReady to Fix Your Car AC?
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