[Vwdiesel] A/C compressors

[Sandy Cameron]

At 08:41 PM 15/07/2006 EDT, you wrote:
>
>  On the Jetta I don't even notice that the A/C is on most of the time.  

 >Don't  feel it kick in and out though like a lot of cars.  :-)  

Must be a 134 system.
I think , in 1994, with the advent of 134, and on the 1.9, a new type of
variable displacement compressor was created, that does not cycle on and off. 

Bentley, Page 8-2, heating and air conditioning.

I notice, (or don't notice) any cycling on my 94 1.9, except at turning it
on or off.
The rest of the time it runs continously and un noticeably.

Bently says it adjusts it's displacement according to the heat load
(refrigerant flow), but runs constantly when switched on.

One would expect the clutch to last much longer than the ones that cycle,
(like my old R-12, 1987 jetta),  on which I was going to install a
compressor cut-out switch on the gearshift for passing execises, before it
grenaded and I removed everything A/C related.

Sandy