21 Apr 11 12:36, Mike Luther wrote to All:

 ML> Howdy!

 ML> A friend has a 1986 Ford Crown Vic in which the factory Air
 ML> Conditioning Compressor cools things just fine.

OK.

 ML> But it also has a frequent on/off, on/off,on/off cycling of the
 ML> compressor.

Frequently as in? Every minute or so, or on and off every second or two?

 ML> Obviously this isn't good for the electric clutch stuff on the
 ML> compressor.

It is if its working normally. If it's cycling on then off and on then off
again in a matter of seconds, it isn't.

 ML> What is a 'normal' cause of this constant on/off compressor action?

The compressor clutch is controlled by the CPU and that is gets it's
signals from how/what the temp setting is at the AC control, inside the
car. It is normal for it to cycle on and off every few minutes.

Supposedly saves fuel and keeps the refrigerant at a constant pressure.


                R\%/itt

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