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Every time i turn on my AC i hear a grinding noise. Its deffinately coming from the compressor. its not very loud, but i dont want to keep using my AC in case it will do permanent damage since it still blows cold air. I checked the system pressure, and it was right where it was supposed to be, so its not low on coolant. I dont know whats wrong, and i dont want to take it to the dealer because its not under warranty. All info is appreciated.

 
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How do you check the pressure?

 
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I bought an AC recharge kit from Advance Auto Parts and theres a gauge you hook up to your AC line

 
Rep Power: 337

why would it not be under warranty? if you have the warranty go get your money's worth, and if they don't honor it then get a lawyer

 
Rep Power: 454

If you hear a grinding noise coming from the compressor, and the AC still works, then tyou need to replace the compressor. Compressors do become noisy, just like engines. Internal parts wear out.

 
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well that sucks, i dont want to replace the compressor. it sounds expensive. and its not under warranty because i bought the car used with 115000 miles on it... its a 2k1

 
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i have the same problem with my 01 lx as well, but its not constant...

only when i get out of a dead stop or highends it sometimes makes a whinning noise like mice are having a orgy under my hood... but i have noticed lately whenever i have the a/c on the car losses massive speed and acceleration.

literally you can hold the gas pedal down and the car feels like youre stuck in neutral for like 3 seconds before it kicks back in again, are you having these same symptoms as well?? hope its nothing big.

 
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no it doesnt squeal, but i do lose alot of power, but not that much... just the normal amount lost with the ac is on.