>Date:    Tue, 19 Jul 2005 07:15:37 -0400
>From:    Edward Maglott <emaglott@BUNCOMBE.MAIN.NC.US>
>Subject: Re: AC converted to 134
>
>I was not aware of a system that turns off the compressor when engine temp
>reaches a certain level.  I thought it was just based on pressure within
>the AC system.  It turns the radiator fan up to high, and if it still can't
>lower the pressure the compressor will turn off until pressure drops below
>preset level.
>Edward
>
>
At least from '86 onward, the second setpoint on the two-stage radiator
fan thermoswitch (102�C / 216�F) does two things: Turns off the A/C
compressor, and turns the Rad. Fan on High.  The only thing the high
pressure (freon pressure) switch does is to kick the radiator fan up the
the intermediate speed on high discharge pressure - it will not shut
down the compressor.  So...anytime the rad fan kicks into high, the
compressor shuts down.

Keith Hughes