2002 honda civic a/c works 20min then compressor shuts off?

The clutch does not engage again until the car sits for some time. Then the whole thing happens again.

Have you checked the system pressures? What's the Low and High pressure readings when the AC is working good? Does the vehicle has overheating problem? Is the blower motor is blowing? Are both fans running when the AC switch is on?

It could be anything: There are relays: Fan relays (2), AC clutch relay, Blower motor relay. There are AC pressure switch, Radiator fan switch, Compressor thermal protector sensor, Evaporator temperature sensor, the Multiplex controller (For communication serial line), Loose/ Burnt connections, incorrect AC clutch gap etc

Anything that sticking or quit when heats up. You'll have the answers to all of my questions before I can guide you to the right path to find out the cause and how to correct the problem.

Anyway go to this site and download the Factory Service Manual (FSM) for your Civic for free. Choose the Civic 02-03 manual. If you need software to open the d/l manual, let me know and I'll send it to you through E mail (Avoid the copyrighted)
http://hondatech.info/downloads/Auto/Manuals/Civic/

I'll need your update information and your E mail address and I'll send to you a copy of the FSM and all instruction how to diagnose and repair steps for your Civic. HTH

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