R12 --> R134 on 4kq. Works, but....

[Ti Kan]

Bob writes:
> [ 4kq R-134a conversion ]
> However (Why cant anything go as planned?)....  The AC compressor doesnt kick in on its own.  To
> fill it I jumpered the clutch to get things circulating and all is well.  When I was done, I plugged
> it back in and it still doesnt kick in. Any suggestions on where to look first??

Check the high and low pressure switches, the temperature control lever
switch, and A/C fuse and relay.  The Bentley manual has the wiring diagram
for the A/C circuit, which will help you troubleshoot and pinpoint the
problem.  You'll need a DC voltmeter to do this.

> There is still a little bit of air bubbles in the sight glass which I usually try to get rid of, but
> it doesnt seem to be taking any more freon from the cans...

The sight glass is not really useful with R-134a.  Correct system
pressure should only be determined with appropriate gauges connected
to the service ports.

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
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