Question about 1997 Plymouth Neon

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97 Neon Expresso, Schreeching Fan

I have a 97 Plymouth Neon Expresso. There is a horrible screeching noise when i turn the AC or defogger Fan settings on. It happens automatically when the AC is on. When the defogger fan mode is on, it tends to only screech when i reach 50km/h or higher. Its a constant screech when at highway speeds occuring every 5 seconds. Any insight on this problem would be helpful. Thanks!

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  • crock316 Nov 12, 2008

    It could very well be the Compressor. I noticed it doesnt get that cold when the AC is on either which leads me to believe that this is most likely the issue. I will take a look at the belt and make sure that looks good too. Thank you for the response!

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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.

Posted on Nov 12, 2008

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