Q: Ac does not stay cool when on.

asked by on

My AC will be cold at the beginning of a commute and then blow hot air. The Toyota dealership says that I need a new ac relay and clutch assembly. Is that diagnosis worthy of a second opinion? Will a new ac clutch solve the problem or should the compressor be replaced as well?

My car has 199300 miles.
My car has an automatic transmission.

Sometimes the A/C compressor clutch will not engage when it gets hot due to the clutch coil going bad and losing the ability to engage the clutch. I do recommend a complete compressor replacement with the relay.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Ac does not stay cool when on.

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: 2500 RPM idle on cold start. Is this normal? If not, then is it due to a cold start injector?

A higher than normal idle can be due to a stuck open idle control valve or a vacuum leak in the intake when the engine is cold. You may have a bad cold start injector system. I would recommend having...

Q: Weird tapping sound when turning on heat or seat warmer.

It sounds like it could be the blower control module in the dash. It will be hard to get to and you should have a technician repair it.

Q: While driving my Pontiac grand am the SECURITY light came on and stayed on. What could be wrong ?

Your car does have a factory security system and you may need to make sure your keys are programmed to the car or it may leave you unable to start the car. Have the system scanned with a dealer or...

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 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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...