Q: The AC on my 2009 Altima is not working. The clutch does not engage and there is no power at the harness on the compressor.

asked by on

The AC stopped working in the winter and I didn't bother looking into it until now. If you push the AC button, the light goes on but the clutch does not engage. I checked the fuse and it is fine and there is power going to the fuse block when I turn the AC on. I pulled the connector at the compressor and am not getting any power there when then AC button is on. I am confused as to what to test next because I can't tell if the relay is built into the IPDM under the hood or if it is located behind the fuse panel under the dash (I can see some relays behind it but have no idea how to get to them). I have not tested the pressure either so I suppose it is possible that if it is low, the low pressure sensor would prevent the clutch from engaging. Do I need to test that first and if so, can it be done without bringing it to a shop? Anything else I can test myself? Thank you.

My car has 100000 miles.
My car has an automatic transmission.

Hi there. I would highly recommend having one of our professional mobile mechanics come to your location and complete an AC is not working inspection, before attempting further diagnosis. There are several possible reasons why you might be having these problems, so it’s always best to let a professional mechanic with experience in these areas diagnose the issue first.

Was this answer helpful?
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. The AC on my 2009 Altima is not working. The clutch does not engage and there is no power at the harness on the compressor.

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: Car runs rough and eventually stalls when idling or at traffic lights

Your stalling problem may be due to a vacuum leak in the engine, but one that only when it is warmed up. This would lead me to believe there is a possible problem with the EGR valve and its intake...

Q: Q: car wont start

In this case, the problem is either the range selector which tells the transmission which gear has been selected, or the park/neutral switch, which will cut power to ignition if the selector lever is in any position other than park...

Q: Car vibration when stopped or moving slowly

Hello. Most vibrations are related to some kind of misfire. A misfire can be related to air, fuel, or spark. This vibration is noticeable when the vehicle is not moving because the RPMs are lower. As the vehicle speeds up,...

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 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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.