Skip the auto shop - Our mechanics make house calls

Q: AC stops working occasionally

asked by on

Hi. The AC in my car is not working correctly. On trips that last about an hour or more, it stops cooling and barely works. Occasionally, when it doesn't work at all, it sounds as if it is working pretty hard. Restarting helps sometimes. Usually, it takes about half an hour for it to be turned off so that it could start cooling again. The car has a mileage of about 115,000 miles. How can I fix this? Thanks.

Hello. This is a common problem on this vehicle. It is usually caused by a failing actuator under the dash. It can also be one of the temperature sensors but that is not as common. I usually install a scan tool to monitor what the AC module is requesting. If it starts to get hot for no reason I then check the actuator to see if it stops holding the blend door in the right position. If not, then the actuator needs to be replaced. If the actuator is fine then the sensors need to be checked. If those are also fine I reprogram the control module and then replace it if it will not hold the programming. If you need to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your AC system and make the correct repair(s).

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: Windshield wipers not working

There are many different reasons for your windshield wipers not functioning correctly. It sounds like you need a qualified technician, such as one from YourMechanic, to stop by and inspect your windshield wipers, A/C compressor and transmission to see what...

Q: howling noise?

Hi there. Thanks for writing in today about the problem with your 96 GMC C1500. The howling noise when driving is typically an indication of many of the items you mentioned: wheel bearings being worn out, tires being cupped, or...

Q: Traction control

A lean fuel condition may be caused by a number of things. An intake air leak, a dirty or faulty mass air flow sensor, a faulty fuel injector, a faulty oxygen sensor, a faulty fuel pump are just a few...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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.