924Board.org

mhariush · Joined: 28 Mar 2016 Posts: 19 Location: Los Angeles

My 78 came with a dealer installed AC from Cool Volkswagen Products Corp.

It's currently not working, and I dont know why. The switch in the vents doesn't turn anything on when enabled. And there are two wires, Red and White in the engine compartment that isn't connected to anything. So that makes me wonder if that's for the control unit, but I don't know where or how they are connected.

Does anyone here have the Cool AC system installed in their car?

I'd love to see how it's connected on yours to see if I can trouble shoot.

Or if you have successfully restored or fixed one.

Under Dash

Under Glovebox

Control Unit

Loose wires

Compressor

_________________
78 924, 87 944S, 89 944 Turbo, 08 Cayenne

Mclaren924 · Joined: 13 Oct 2021 Posts: 259 Location: Oceanside CA

mhariush · Joined: 28 Mar 2016 Posts: 19 Location: Los Angeles

Is it the same "cool" system?
_________________
78 924, 87 944S, 89 944 Turbo, 08 Cayenne

Mclaren924 · Joined: 13 Oct 2021 Posts: 259 Location: Oceanside CA

It doesn't have the same vent setup but AC Compressor looks identical.
_________________
1980 931 "Salt" Bucket wannabe racer (Dreaming)
1979 924 Sebring "Pepper" -Sold
1977 924 Slicktop "Pennie"-Most likely parts
1979 3/5 gt clone 924- Shop Test Car

mhariush · Joined: 28 Mar 2016 Posts: 19 Location: Los Angeles

There's mention and schematics of the compressor in the 76-79 PET so it seems it was partially an option from factory?
_________________
78 924, 87 944S, 89 944 Turbo, 08 Cayenne

Beartooth · Joined: 05 Apr 2022 Posts: 314 Location: Roberts, MT

If the refrigerant circuit is still sealed (even if the refrigerant has all leaked out), I'd think you can save it. I'd flush it out and replace any seals - it could just leak out in no time or even shell out the compressor and spread black death through the system. At this age, it would probably also make sense to replace the refrigerant hoses. If you've got a hydraulic shop nearby, you should be able to take the hoses to them and have the rubber replaced. The wiring could be something you have to figure out on your own. I'm sure the kit came with an instruction sheet, and if it was a fairly common kit, somebody may have scanned a copy you could find online somewhere. There's a good chance you're on your own though... Seems it'd be more complicated than refurbishing a factory AC setup, but if you want/need AC, I'd say it's worth the effort.
_________________
1980 931 diamond in the rough