Noisy A/C Compressor

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mn9876 - 05 Aug 2006 06:02 GMT

I have a 94 Nissan Sentra. Right now my radiator and A/C fan do not
work but as long as the car is in motion, everything is getting cooled
OK. During normal operation, when the compressor kicks on, it makes a
squealing sound for a second and then stops. During that time, the air
coming out of the vents gets warmer and then cools right down again.
Also, when I have the hood open and the A/C is on, the compressor kind
of makes a knocking sound.

Both fans run off of a single relay, and the fuses and relay have been
tested good. Any ideas on both / either issue would be much
appreciated.

Thanks in advance.

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AS - 05 Aug 2006 07:05 GMT

The noisy compressor could be due to lack of oil or to the system
pressures and condition.

The squeal could be the drive belt slipping.

Good luck

> I have a 94 Nissan Sentra. Right now my radiator and A/C fan do not
> work but as long as the car is in motion, everything is getting cooled
[quoted text clipped - 9 lines]
>
> Thanks in advance.

Reply to this Message

man1234 - 05 Aug 2006 20:59 GMT

I checked out my belts and I definately need to replace all three. Any
ideas about the fans? I haven't checked the diagnostic codes from the
computer yet, so that will probably be my next step.

Thanks

> The noisy compressor could be due to lack of oil or to the system
> pressures and condition.
[quoted text clipped - 16 lines]
> >
> > Thanks in advance.

Reply to this Message

AS - 06 Aug 2006 04:17 GMT

Judging by the quality of the fans in my Maxima, I would doubt that the
fans are the problem.

> I checked out my belts and I definately need to replace all three. Any
> ideas about the fans? I haven't checked the diagnostic codes from the
[quoted text clipped - 22 lines]
>>>
>>>Thanks in advance.

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man1234 - 07 Aug 2006 21:00 GMT

Guessing from the contents on my Haynes manual, I think it might be
either the temperature sensor or the speed sensor. Does anyone know
where the computer is located on my 94 Nissan Sentra? The Haynes manual
doesn't really tell me.

Thanks

> Judging by the quality of the fans in my Maxima, I would doubt that the
> fans are the problem.
[quoted text clipped - 25 lines]
> >>>
> >>>Thanks in advance.

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