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Air conditioner screeches when turned on. - 1998 Honda Civic

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Sounds like a worn or loose belt, check that first. If it's the compressor you will need
professional help.

Posted on Apr 20, 2011

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Air conditioner quit working and makes a loud screeching sound when turned off

I think their may be something wrong with the AC compressor clutch but without a look myself i could not tell you so please consult a local mechanic

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What causes the air conditioner unit to screech

the compressor is seized.
key off.
a/c belt off.
apply power 12vdc to the clutch, the clutch is not enabled.
then buy hand, again engine off. turn the a/c pulley buy
hand, i bet you cant, and is called Seized.
this method works for all parts, on all belts that might seize.
(only a/c needs the clutch active to feel it)
it is possible the clutch bearing is siezed.
that can be fell with not applying 12vdc it s coil.

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My 2002 nissan Pathfinders heater switch works on on 1,2,3 not 4

For the screeching noise you need to replace the blower motor and for the blower motor speed you need to replace the blower motor resistor.

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Screech at startup, air conditioner causes shutoff

Did the shop not road test it with you driving & then them?

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1 Answer

How to replace an air conditioner compressor and tensioner

The screeching noise is of course the belt traveling faster than the pulley it is around, in other words it's slipping. Hopefully you have a worn belt, it takes quite a bit to pull a compressor. Assuming that the compressor is in working properly and your belt is good, look at the tension pulley. I had a vehicle once that did the same thing and after a lot of "try this" didn't work I got a new tension idler pulley and it fixed it. The old one wasn't putting enough tension on the belt to hold it tight enough to pull everything. Since then I have ran into several that were so weak they wouldn't hold proper tension. Just something that is overlooked a lot of times because he belt seemed tight enough. Just one more thing to try, hope it's not anything with the compressor because as you know they like those compressors and want give them up cheap.

Jul 15, 2012 | 1999 Chevrolet Silverado 1500

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My car screeches when its started and when accerlerating. Someone just replaced the alternator and belt and now my car screeches and the air conditioner doesn't get cold. What could be wrong?

The belt has not been tightened properly, it may still be loose. wiggle the belt with your hand, it should feel firm, if it feels loose, that's your problem.

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97 Neon Expresso, Schreeching Fan

Both your air con and defogger (I am assuming you mean front windshield defroster setting, and not the back window) engage the air conditioner pump/compressor.

The screeching can be either a bad belt or a bad compressor.

How long has it been since the belt was changed? If it is old, and slipping, it will cause the screech at speed.
If the belt has recently been changed, and is adjusted properly, I would start looking that the air compressor pump.

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1 Answer

Screeching noise when I turn on my air conditioner or heater

It may just need to be adjusted (it sounds like it's too loose). If the belt isn't cracked or frayed, you should just have it tightened up a bit . If there are signs it is worn (cracked frayed) replace it.

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RE: 2001 Nissan Altima air conditioner

Sounds to me like you need the alternator idler pulley. Look at it and see if it has a big washer covering portion of the pulley, or if the washer is inside the pulley. If its inside, than you have an old pulley. Replace it with the one, that has the big washer in the middle of pulley. You do have another idler for the A/C compressor. Those I have seen fail also. But 80% of the time its the alternator idler pulley.

Jul 14, 2008 | 2001 Nissan Altima

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