If you’ve ever had to deal with a car that makes an audible hiss when it’s turned on, then you’re not alone. This annoying sound is known as the “ventilation noise” and it’s caused by air pressure in the car suddenly dropping when the compressor kicks in to cool down the engine.
Causes of Hissing Sound when Car Ac is Turned On
There are a few possible causes of the sound of a car ac unit hissing when it is turned on. A small leak in the system can cause the air conditioner to work harder to cool down the car, which can lead to a hissing noise. Another possibility is that the compressor has failed, which would cause the ac unit to work constantly and produce a hissing noise. If you hear this sound and think that your car ac unit might be defective, it is best to take it in for repairs.
How to Fix Hissing Sound when Car Ac is Turned On
There can be a lot of causes for a hissing sound when the car’s ac is turned on, but most of them can be fixed with a quick fix. Here are four of the most common reasons for a hissing sound when you turn on your car’s ac:
1) A faulty air conditioning unit – If your car’s ac unit isn’t working properly, it could cause the compressor to start making a weird noise. In this case, it might be necessary to replace the ac unit.
2) A clogged air filter – If debris has built up over time in your car’s air filter, it will cause the compressor to work harder to get cold air into the system. This will create a hissing noise. You can clean your air filter by using an air cleaner or by using compressed air.
3) A loose connection – If there is a loose connection between the compressor and the condenser fan, this will cause the compressor to work harder and produce more noise. To fix this problem, you’ll need to tighten up the connections between these two parts.
4) A broken or malfunctioning fan – If one of your car’s fans is broken, damaged, or not working properly, this will also cause the compressor to work harder and create a hissing noise. In order to fix this problem, you’ll need to replace the fan.
Conclusion
The sound of a car ac unit hissing may be something you’re never too worried about, but if it’s happening more often or seems to be getting louder, there might be a problem. Often times, the air conditioning system in our cars can become clogged up with dirt and debris over time, which will cause the ac unit to work harder to generate cold air. If this process becomes too noisy or strenuous for the AC unit, it may start to make a hissing noise. In most cases, cleaning the AC unit and removing any obstructions will solve the issue and restore normal operation.