Skip the auto shop - Our mechanics make house calls

Q: AC makes hissing noise and doesn't blow cold

asked by on

I purchased a pre-owned Bravada. The car has an issue with the AC not working correctly. When I turn it on, it doesn't blow cool air at all and it starts making hissing noises. What could be the problem?

A: The hissing noise is due to the A/C evapora...

The hissing noise is due to the A/C evaporator being starved of enough Freon. You will need to have Freon and dye added to the system and the hissing will go away. Then use a leak dye light (black light) and check to see where a leak is and fix as required. If you want to have this looked at for you, a professional from YourMechanic can come to your car's location to add Freon, detect any coolant leaks, and perform any repairs that are needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Screeching sounds around front left tire

The front brake pads should have a metal sensor on the brake pads to indicate when they are getting low on pad material. They will squeal or screech anytime you are moving. Have the front brakes inspected and replaced as...

Q: Engine rebuilt

If you had a piston skirt broken off inside your engine, it would not be running as it would have immediately caused major internal damage. The tapping sound you hear may be anything from simply low oil, to a worn...

Q: Truck not going into four-wheel drive

There are several things that can go wrong with the system on a Blazer. The switch is a part of the system and can possibly not be making good contact. There is a motor on the transfer case that engages...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.