Mechanics

MY A/C MAKES A REALLY LOUD SQUEELING/CHIRPING NOISE WHENEVER ITS ON WHAT COULD BE THE PROBLEM?

1999 Nissan Sentra • 142,670 miles

It doesn't go away until I hit high speeds or turn off the a/c but as soon as I slow down or turn the a/c back on I starts back again

I've already replaced the bearings
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Dhulse96
February 8, 2012.




Loose belt or the compressor is locking up.

Roy

If the belt is not loose or the compressor good, check for a bad harmonic damper on the crank pulley.

KHLow2008
Feb 8, 2012.
My mechanic said it might be the compresser, is tht something I need to fix right away, and can I still try to ride with the a/c?

Tiny
Dhulse96
Feb 10, 2012.
If it is the compressor, you can drive but avoid using the A/C to prevent any unwarranted damages if the compressor were to give way.

KHLow2008
Feb 10, 2012.
What if it makes a low squeeling noise even when the a/c is off and hasn't been turned on yet

Tiny
Dhulse96
Feb 16, 2012.
Then you would need to check the other drive belts. It could be the alternator belt or as I mentioned in previous post, a bad harmonic damper.
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KHLow2008
Feb 16, 2012.

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