Skip the auto shop - Our mechanics make house calls

Q: Air conditioner cuts out when accelerating or under pressure going up hill.

asked by on

I noticed today that whenever traveling and accelerating like going uphill for an extra length that my a/c will quit blowing and as soon as I level off or the need to accelerate levels off it will resume blowing.

My car has 197000 miles.
My car has an automatic transmission.

A: Hello. Typically this occurs due to a bad v...

Hello. Typically this occurs due to a bad vacuum check valve under the hood. During hard acceleration the AC door system loses vacuum, causing the doors to default to the windshield. This check valve keeps this from occurring. It is located under the passenger side of the hood. If you want to have it replaced, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your AC system and make the necessary repairs.

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: Throttle Position Sensor

Hi There, It sounds like what you are describing is an intermittent throttle response when pressing the gas pedal. If this is correct, this may be related to the throttle position sensor. The throttle position sensor monitors the throttle position...

Q: Cruise control broken

Hi. Cruise control systems only engage past about 35 mph, so make sure that is not the issue. Other issues that can sometimes interfere with the cruise control are brake lights that may be having connection issues. The system uses...

Q: Malfunction of electrical components - 2006 Cadillac XLR

There is a Recall for a possibly related electrical issue with your vehicle. The Recall issue (NHTSA recall campaign 06v263000) addresses an electrical issue that has damaged various electrical systems with your model vehicle. Discuss this with your Cadillac dealer....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...