More AC - 90 CQ

Andrew Duane aduane at
Tue Jul 1 09:48:10 PDT 2008

I think that's the way it's supposed to run. I'm pretty sure I remember
my 100/A6/A6A working that way.

quattro-bounces at wrote:
> Hi List,
> As long as we're on AC problems here, I've got a 1990 CQ with the AC
> Delco-style automatic climate controls.
> The problem I'm having is that the AC cycles on and off at about a 45
> second period.  I set the controls to auto/LO/fan high and rev'd the
> motor.   I can see the clutch on the AC compressor coming on
> and off at
> the 45-second interval.  It's very annoying while driving
> because the car
> lurches a little every time the compressor comes back.
> I'm hoping it's just low on coolant and I can find some R12, but does
> anyone have any other ideas?   I still haven't found a
> Bentley for this
> car, so I don't have the factory service checklist for this AC system.
> Thanks!
> -m
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