Loud Screeching and Whining - Rear Defrost, Heat and A/C
10-24-2011, 05:36 AM
#1
Loud Screeching and Whining - Rear Defrost, Heat and A/C
My 02 6MT is getting a loud screeching and whining noise when I'm picking up from a stop or very slow speed (below 10 mph). This only happened before when I had the A/C on. It now happens if I have heat on or even the rear defrost.
It's not something that happens all the time. After the car has been running for a good 10 minutes with the A/C, heat, defrost on, it usually doesn't make the noise when starting from a stop.
If the car is already warmed up and I decide to use the A/C or heat, there's still a chance of the noise coming up when picking up from a dead stop.
It's extremely loud and can be heard probably from 50 feet away. Once the noise is on, if I shut off the A/C, heat, defrost, it'll go away after a second.
If turning these on while the car is already moving above 10 mph or so, it doesn't make this awful noise.
Any ideas?
It's not something that happens all the time. After the car has been running for a good 10 minutes with the A/C, heat, defrost on, it usually doesn't make the noise when starting from a stop.
If the car is already warmed up and I decide to use the A/C or heat, there's still a chance of the noise coming up when picking up from a dead stop.
It's extremely loud and can be heard probably from 50 feet away. Once the noise is on, if I shut off the A/C, heat, defrost, it'll go away after a second.
If turning these on while the car is already moving above 10 mph or so, it doesn't make this awful noise.
Any ideas?
10-24-2011, 06:23 AM
#4
I would inspect the belts and make sure tension is good and there's no cracks in the ribs, my infiniti started doing that and i just snugged the belt a little more and never gave me trouble any more
10-29-2011, 12:26 PM
#9
Update: I was able to check the belt and it turned out the A/C belt was definitely much more loose than the power steering. I tightened the belt and now the car seems to be fine. Of course, it didn't always happen, so to confirm, I might need a few days but it's looking good.
Tightening it also got rid of a little squealing noise I was getting when picking up in 1st gear or at a very low RPM (800-1000).
Tightening it also got rid of a little squealing noise I was getting when picking up in 1st gear or at a very low RPM (800-1000).
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