Car AC Hissing Noise
A hissing or air-leak sound from the AC system. It may be normal in some cases or indicate a leak.
Possible Causes
Refrigerant Leak
Medium likelihoodA refrigerant leak from a fitting or hose creates an audible hissing sound.
Normal Expansion Valve Sound
Medium likelihoodIn some vehicles, a slight hissing from the expansion valve is completely normal.
How to Diagnose?
- 1 Pinpoint the hissing source (inside cabin or engine bay)
- 2 If from engine bay, inspect AC fittings and lines
- 3 Use a leak detector
- 4 Compare the sound with a similar vehicle to determine if normal
Repair Cost
Depends on cause and vehicle type
| Service | Price | Notes |
|---|---|---|
| Estimated Repair Cost | 0–500SAR | 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
Hissing from AC, is it normal?
It may be normal (expansion valve sound). But if it's loud or accompanied by weak cooling, there's likely a leak that needs repair.
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