Skip the auto shop - Our mechanics make house calls

Q: AC is not blowing cold air - 2010 Buick Enclave

asked by on

When I turn on AC, I hear high pitch noise from the vent, similar to brake worn out warning sound. when turn off AC but with fan still running, noise went away. In either case, no cold air comes out from any vents, only room temperature air comes out.

I checked from engine bay that I do hear AC clutch engaging and cooling fan working, you think that is the famous cooling/heat actuator problem? I heard that my car has three? What do you think? I have AC pressure gauge, OBDII scanner, I can check those if you need me to.

Thanks.

Humphrey

My car has 74500 miles.
My car has an automatic transmission.

A: Hello and thank you for contacting YourMech...

Hello and thank you for contacting YourMechanic. The noise you are hearing is the serpentine belt burning on the A/C clutch pulley from the A/C compressor being locked up.

Open the hood and with a flashlight look at the A/C compressor and watch what it does when you have someone turn on the A/C switch. If the compressor does not turn and you see the pulley stop turning, then the compressor has seized. If the A/C clutch is working and the pulley turns the compressor, then the bearings inside the compressor could be failing causing the sound.

For the air at the vent being not cold, then the A/C system is low on refrigerant or has too much refrigerant. Also, if the FOT (fixed orifice tube) is plugged, then the air will be not cold.

If you’d like to have your A/C system diagnosed, then seek out a technician, such as one from YourMechanic, who can assist you with your vehicle at your home or office.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: When turning left from a stop vehicle binds and stability control warning light flashes

Hello, Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU. When the...

Q: Does my catalytic converter have a sensor?

Hello, thanks for writing in. You do have a catalyst O2 sensor. The failure of the 15psi test is most likely the catalyst is clogged causing the excessive exhaust back pressure. The catalyst should be replaced if it exceeds the...

Q: Good morning Allen, I need to have my 2009 Buick Enclave's catalytic converter replaced. The dealer quoted me $977. Is that a good

Hi. The price they quoted you at the dealership is not that bad but you could probably get a better price at midas or a local exhaust shop. By federal law your catalytic convertor has a 10 year warranty on...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...