ford aerostar a/c cycling pressure switch


Old 09-06-02, 06:42 AM
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ford aerostar a/c cycling pressure switch

my 1993 aerostar a/c stopped a few days ago, i thought the clutch on the compressor had quit but if apply 12v to it directly it works fine and the ac cools off nicely. my problem is if i put a meter on the line and disconnect the plug from the clutch i read 12v as soon as i reconnect the plug the voltage drops to millivolts, i am wondering if the contacts on the pressure switch may be dirty or worn out but i cannot find the switch anywhere, i tried following the wires to locate it, according to the wiring diagram it is in series with the bl/y wire. could someone tell me where it is located (pressure switch) ie under dash or on the fire wall, or what else the problem may be

thanks Martin
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Old 09-06-02, 09:04 AM
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Hit any Ford parts department at the dealer and they'll find it on their parts diagram in a jiffy. Probably have the switch in stock too.
Old 09-06-02, 05:58 PM
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
It should be on the accumulator on a aerostar van,black tank on passenger side firewall.

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