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If the car makes a lot of noise when the air conditioner is engaged there is most likely an issue with the compressor. If I can assist further, reach me at https://www.6ya.com/thericepatch
Is the whining noise coming from the engine compartment where the compressor is located or is the noise coming from inside the car? If the noise if coming from inside the car it could be your blower. When a blower wears down the bushing is the first thing to wear down and it begins to have play. That makes the blower/fan vibrate making a loud whining noise. Replacing the blower could solve that whining noise.
If the noise if coming from the AC compressor, it also could be a bad bearing within the compressor.
It would depend on where the noise is coming from. Could be a belt, the compressor, or the blower motor. The blower would be noisy in both ac and heat mode.
Sounds like the clutch in the compressor which would usually be in the front lower portion of the engine on a pulley on the front of engine (passenger side on front wheel drive cars - and tubes are connected to it. When engine is off spray with some lube but not on belt - allow to drip of for couple minutes. Try that couple times and start car in between times using the air conditioning. Not sure if you can replace the clutch unit or have to replace the compressor as a unit which would lose the Freon or R2 or whatever the new stuff is called now... Hope that helps. East Coast Canada Rocks!! :)
If its a whining noise, it could be a belt slipping. If its more of a grinding noise, the blower motor could have a bad bearing or something has found its way into the area around the fan. You'd have to figure out where it is coming from. If it sounds like its coming from under the dash, its probably the blower motor.
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