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Join Date: May 2002
Location: St Louis
Posts: 4,211
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AC high low pressure switch
My 88 Cabriolet is supposed to have a high/low pressure switch in it. Interesting since the compressor runs when my gages indicate 0 psi.
But anyway does anyone know where it is located. |
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06-19-2006, 10:14 AM
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Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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I *think* this is a worthwhile upgrade.....not stock fitment for mid-late 80's cars....
Right? - Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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06-19-2006, 10:17 AM
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Location: Southern California
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My aftermarket Giffiths switch is located near the compressor. I've heard that some may be on the receiver/dryer, which is located in the front left wheel well.
I don't think they were standard items, but I'm sure one of the a/c gurus (Jim Sims, Charlie Griffiths, etc.) will chime in to confirm. And, I agree with Wil, if you don't have one it is a worthwhile upgrade. Scott
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1984 Targa |
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06-19-2006, 10:25 AM
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The upgrade I did to my '89 930 recently included a high-low switch. It tied into to the wiring to the compressor relay in the smuggler's box. Previously my car did not have one. My understanding is the original refrigerant R12 did not require a switch but R134a operates at higher pressures so does. My understanding may be wrong, however. I'm sure one of the experts will chime in...
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John 2005 997 Carrera S -- Artic Silver/Sea Blue Former friends: 1989 930 factory Slantnose / 1998 C4S Coupe / 1973.5 911T / 1976 914 2.0 |
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06-19-2006, 10:28 AM
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Scott and I were typing our posts at the same time and almost said the exact same thing!
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John 2005 997 Carrera S -- Artic Silver/Sea Blue Former friends: 1989 930 factory Slantnose / 1998 C4S Coupe / 1973.5 911T / 1976 914 2.0 |
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06-19-2006, 10:29 AM
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Location: St Louis
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The reason I thought it had one was on page 97-139 of the Factory Service Manual schematics in zone L-21 there is a switch labled high pressure and low pressure switch.
I've had the car for 8 years, the AC has never worked and I am older and tired of sweating. Over the time I have owned the car I bet I have run the AC a total of 30 minutes 10 minutes at a time hoping it would cool me off, never did. Do You think I hurt anything? |
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06-19-2006, 10:34 AM
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911 A/C is mediocre at best. I upgraded my components and now it works as well as my other "normal" cars. A few vendors make upgrade kits. I used retroair.com located near me in Dallas. FYI, a write up of my installation project is here: http://forums.rennlist.com/rennforums/showthread.php?t=267009
Mine is a turbo with a different condenser but they make a kit for a non-turbo too.
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John 2005 997 Carrera S -- Artic Silver/Sea Blue Former friends: 1989 930 factory Slantnose / 1998 C4S Coupe / 1973.5 911T / 1976 914 2.0 |
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06-19-2006, 10:42 AM
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