Question about 2001 Plymouth Neon

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Screeching noise coming from the fan when the AC/Defogger is on

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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Sounds like the a/c clutch needs replaced

Posted on Nov 12, 2008

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SOURCE: 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.

Posted on Nov 12, 2008

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Posted on Jan 02, 2017

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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.

Nov 12, 2008 | 1997 Plymouth Neon

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