Mk II Air Conditioning?

[jarrett at rpa.net (Jim Jarrett)]

Quoting Dan Bubb <jdbubb@verizon.net>:

> I don't believe the pressure switches control the compressor. The
> thermostat controls compressor clutch on/off.

Ah!  This does seem to make sense.  And, you're not referring to the coolant
thermostat, correct?  Where's the a/c thermostate?

> There is a low pressure switch that prevents the compressor from running
> if the freon charge is too low to prevent damage to the compressor and
> there is a high pressure switch that turns on the radiator high speed
> fan once the high-side pressure is above a certain point.
> The pressure switches are not valved to my knowledge.
> I can't see how the pressure switches, considering their relative
> functions can be responsible for compressor cycling, but don't have
> enough experience otherwise to suggest what might be causing it other
> than, perhaps, a bad expansion valve. (the expansion valve is always the
> problem unless you have a leak)

Ah.  And this also makes more sense.  Maybe John was referring to the expansion
valve.  On a Scirocco, where is this?

Thanks!

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| Jim Jarrett,McFarland, WI       2006 Golf GLS                 |
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