XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

1989 XJS A/C Clutch always engaged

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Old 10-02-2016, 02:30 PM
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Default 1989 XJS A/C Clutch always engaged

I just fixed my A/C systems electrical clutch connections and new fuse.
The A/C works fine, except that when I set it to off on the HVAC control panel the clutch does not disengage.

Thanks for your assistance
 
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Old 10-02-2016, 03:05 PM
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I just read that having the A/C compressor running continually is the expected mode of operation as a modification was made to convertibles to run the A/C to keep cooling the fuel even if the A/C is turned off.
Can anyone confirm that this is correct?

Thanks
 
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Old 10-02-2016, 03:17 PM
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IIRC, you are correct. The thought was with the top down the A/C would be off and therefore the fuel cooler would not be working. So when the car is on in a convertible the compressor is also on.
 
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Old 10-02-2016, 04:22 PM
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Thanks for confirming this JTcmks, am I right to think that is only the case when the top is down and that once the top goes up the AC will switch on and off.
 
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Old 10-02-2016, 04:40 PM
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I was under the impression that in the converts it's anytime the car is running, top up or down.

The opening line in the following link says it all...

http://andthatsjazz.org/jaguar/heatermod.html
 

Last edited by JTsmks; 10-02-2016 at 04:51 PM.
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Old 10-02-2016, 05:00 PM
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Thanks, you could be right, I did not see any circuit to override the clutch when the A/C clutch when the top is up.

Cheers
 
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