Location of AC Pressure Switch S3 Spider - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 10 (permalink) Old 10-26-2017, 12:41 PM Thread Starter
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Location of AC Pressure Switch S3 Spider

I need to charge the AC, but the dryer does not have a pressure valve (like in every other car I know). Can someone tell me where it is, and if possible, send me a picture of it?
Thanks.
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post #2 of 10 (permalink) Old 10-28-2017, 05:28 PM Thread Starter
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Anybody?
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post #3 of 10 (permalink) Old 10-28-2017, 06:01 PM
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Do you mean the high/low pressure cut off switch?
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post #4 of 10 (permalink) Old 10-28-2017, 06:57 PM Thread Starter
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Correct. I have always seen these attached to the dryers in other cars.
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post #5 of 10 (permalink) Old 10-29-2017, 12:14 PM Thread Starter
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My car is a Spider S3, 1986 model. I need to know the location of the pressure switch on a factory, stock vehicle. Thanks.
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post #6 of 10 (permalink) Old 10-29-2017, 03:16 PM
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S3 Spiders did not have a pressure switch.

Jim

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post #7 of 10 (permalink) Old 10-29-2017, 05:20 PM
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Quote:
Originally Posted by papajam View Post
S3 Spiders did not have a pressure switch.

The 1990 Series 3.5 and 91-94 series 4 spiders have A/c trinary pressure switch on receiver dryer according to shop manuals but 86 manual does not show one for series 3.

I thought my friends 88 Quad has it but I maybe mistaken. Car not near me now to check on it.

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Last edited by Alfisto Steve; 10-29-2017 at 05:30 PM.
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post #8 of 10 (permalink) Old 01-11-2019, 03:38 AM
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whats the difference between a series 3 and 3.5, I have a 1990 spider velocie and im looking for ac pressure switch ?
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post #9 of 10 (permalink) Old 01-11-2019, 06:07 AM
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Quote:
Originally Posted by Bullethead View Post
whats the difference between a series 3 and 3.5, I have a 1990 spider velocie and im looking for ac pressure switch ?
series 3.5 (MY1990 in the USA) is basically the motronic injected engine from the S4 (less power steering) in a S3 body.

the trinary (pressure) switch is mounted on the receiver/dryer

numbers #7 & #8 in this page from the parts book:
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Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
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post #10 of 10 (permalink) Old 01-11-2019, 05:24 PM
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thank you !!
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