Lawrence,
In cars built during the middle '70s and up, the A/C clutch is suppose to
cycle, not stay on all the time, unless the system is turned on to "Full". Even
then, it will only stay on continuously until the system senses a predetermined
maximum cold temperature has been reached.
If the system is continuously cycling, and very quickly (like
on-off-on-off)that means that the system is low on Freon. Your car probably has
R-12 in it. That runs about $150.00 per pound. If the system needs more than 1
and 1/2 or two pounds of Freon, the A/C clutch will not engage at all. The
system probably holds a total of 3 or 4 lbs of Freon.
The A/C compressor is suppose to run and cycle when the defroster is on.
Paul
In a message dated 3/28/2004 10:24:59 PM Eastern Standard Time,
lnoska@xxxxxxxxxxxx writes:
>
>
> The wife and I went for a drive today, the weather was just gorgeous, and I
> was the passenger. So I started to test some things.
>
> When I have the defrosters on it sounds like a door is trying to close!!!
> And when the AC. is on I hear the same noise, could the AC clutch be
> defective?? Does any body out there have a thought on this? I haven't
> started to diagnose this trouble yet.
>
> With the AC on I can hear the compressor coming on and going off. It will
> finally stay engaged, could this be from lack of use??? Is there a relay
> for the AC compressor?
>
> Lawrence R Noska
> lnoska@xxxxxxxxxxxx
> Hauser, ID 83854
>
>
>
>
>
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