CAR AC MAKING HISSING NOISE

Car ac making hissing noise. Hissing sounds from a car air conditioner can make a person feel a little dazed. It's not something they expect to hear inside their cars. So we did a lot of research into this situation and found an answer for what could be the cause.

Car ac making whistling noise

The air conditioner is not always a worrying sound for car owners. If this sound occurs after the car is turned off, this is your car's way of equalizing the pressure. But hissing can be annoying when it is persistent and usually indicates one of three problems:

• refrigerant leak

• scale valve leak

• compressor problems

However, listing these issues does not provide a complete picture of the problem. Therefore, it is necessary to delve into the possible disease of the air conditioning unit. Our following discussions will give you a good idea of ​​what to expect when you go for repairs.

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Causes of hissing car air conditioner

As mentioned earlier, hissing isn't usually a problem. It's common to hear that it's part of your car's decompression process. Most car owners expect the sound to occur after the car is turned off.

The hissing comes from the low pressure side and the high pressure side within the AC system while it is running. The refrigerant from the air conditioning unit, like Freon, will move between these sides divided by an orifice tube or expansion valve.

Once your car is turned off, the Freon will go from the high pressure side to the low pressure side and equalize. It is a normal operation that should not cause any concern to the car owner.

But things can start to get complicated when the noise is happening all the time or at any other point. In these cases, the beeps serve as a warning sound and indicate various problems.

Here is a quick overview of the most common:

1. Coolant leak

The problem with your air conditioning unit could be a gas leak. Leaks along the refrigerant lines of your air conditioning unit will allow gaseous refrigerant to escape under high pressure. As you can imagine, this situation is quite problematic.

If this happens, the air conditioner will lose its refrigerant charge. Then this can damage the compressor and endanger the entire unit. You will need to fix these leaks as soon as possible.

2. Inner valve leakage

The next potential problem would be a leaky compressor valve in the air conditioning unit. If this happens, it will cause a hissing noise that you should not ignore. This valve controls the pressure of the refrigerant in the air conditioning unit.As a result, this compressor valve will need repairs immediately. Otherwise, this leakage may endanger the entire unit and cause serious damage.

3. Problems with the compressor

Finally, the compressor itself may be malfunctioning. It is often a byproduct of elevated internal pressure. As most car owners know, the compressor is the most expensive part of an air conditioning unit to repair.

Many car owners find it more cost-effective to replace the entire air conditioning unit rather than just repairing the compressor. However, if the hissing turns into a squeak, feel free to turn off the air conditioner immediately. You will have to fix it right away.

How do I fix the hissing noise in my car air conditioner?

The next obvious question would be how would someone fix the air conditioner in your car. Well, we recommend letting the experts do it. If you hear a hissing sound coming from the air conditioner, turn it off and take the car to a mechanic for repair.

It is also necessary to refrain from operating it until it is checked by an expert. This problem is not just wasting your time as a car owner. Do not attempt repair unless you are very experienced in operating automobile air conditioning units.

If you have car ac making humming noise inside and coming from other parts of your car, see our post Car Whistle Noises But Stops When Braking - What Could Be Wrong?. It will provide a detailed look at what could be causing that noise.

Other annoying car air conditioner noise

Hissing isn't the only one that's been known to come from air conditioning units. Vehicle owners should be aware of other noises and their meanings

How much does it cost to fix a car air conditioning leak?

Car owners can expect to spend between $150 and $800 to fix an air conditioning leak. The final amount will depend on its severity and damage. You may also need to purchase additional parts to repair your air conditioner for effective performance - correcting leaks is not always enough.

For example, you may need to install a new sensor, hose, compressor or capacitor. It can vary greatly from one car to another. But the point is, this fix isn't going to be cheap.

If you're an RV owner looking to replace an RV air conditioner, see our post "How much does it cost to replace an RV air conditioner?" It should answer all your questions.

Is the car air conditioner supposed to leak water?

Sometimes the air conditioner in your car is leaking water from the car. But it can get annoying when you start seeing water inside the car after turning on the air conditioner. Another disturbing sight is that there is more water than usual outside your car.

This leads us to the question of what could be causing these annoying situations. In most cases, this boils down to one of five reasons:

1. Low coolant level

The air conditioner in your car will require a certain amount of coolant to provide effective circulation of cool air. If the coolant level is too low, it will lower the pressure in your car's air conditioning system. Low pressure is a bad sign because it will cause the evaporator coils to freeze and freeze.

If the coils freeze, the condensate drain pan can overflow and lose an abnormal amount of water. Not a good case for anyone involved.

2. The condensate drain is not properly connected to the ventilation system

Another possible reason why your car air conditioner is leaking water inside your car is around the condensate drain. It is not uncommon for this part to leak when not properly connected to the ventilation system. If this happens, you cannot drain the water where it is supposed to go and under your car.

3. The condensate drain pipe is clogged

If there is a water leak inside your car, this is a warning that your car's condensate drain may have a clogging problem. It is essential to check the condensation drain when your car's floor gets wet every time you turn on the air conditioner.

Blocked condensate drain pipes cause this problem by preventing water from draining from your vehicle. Instead, it causes water to overflow inside the vehicle.

4. Obscured/dirty air filters

The air filter in the automatic air conditioner will collect and collect dirt due to moisture or dust. It is just a natural process of regular exposure inside the car. As a result, it is necessary to inspect and repair the air conditioner once a year to keep these filters clean.

Air filters with a lot of debris will cause a blockage. It can then freeze the air conditioner's evaporator coils, causing excess water to flow into the condensate drain.

5. Defective seals

The rubber or plastic seals in the air conditioning system may be the root of your problem. Water can easily leak from the system into your vehicle's cabin area if it fails. You will soon notice water collecting under the floor mats on the passenger side of the vehicle.

How often should you put freon in your car?

You shouldn't put Freon in your car very often. Only once every few years at most you will succeed. You likely have a leak problem if you notice that your air conditioner loses power even after filling it up.

How long does a car air conditioner last?

Most car owners expect their air conditioning units to last at least ten years. But it can last longer by focusing more on maintenance. If you notice a problem, don't let it linger. Instead, it is best to fix it and treat it right away.

We hope our discussions about whistles and car ac making hissing noise. But if you still have one, feel free to leave a comment. We will make sure to respond to every post as quickly as possible. thank you for reading!

source : vehq.com

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