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Old 06-14-2009, 09:55 PM
Twizzler
 
Join Date: Sep 2005
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Car: 2002 NB 1.8 GLX RED
Default Air conditioner clutch not engaging

Is this clutch sold separately from the compressor? It stopped engaging just in time for the hot weather. Nothing is wrong with the cooling system other than the clutch engagement, I have not even been using the AC for quite a while. What sort of job is it to replace the clutch unit on the compressor? Any specific tools necessary. Thanks in advance for any and all replies.
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Old 06-14-2009, 10:00 PM
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Are you getting 12 volts at the wire on the A/C clutch? Before assuming the clutch needs replacing there are a number of diagnostic checks that need to be made. Start with the fuses on top of the battery. They tend to melt or burn causing the clutch to not engage.
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Old 06-14-2009, 10:15 PM
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And are you sure it is charged? If it is low on refrigerant it will not engage the compressor.
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Old 06-14-2009, 10:23 PM
Twizzler
 
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What about relay 53 I understand it is a common culprit and is backordered on some websites. Is there a way to test the relay before ripping into the systems any further?
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Old 06-15-2009, 12:10 AM
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If you search through my other posts, you'll find a link to an AC troubleshooting guide. The clutch is available separately, but seems to be about the same price as an aftermarket, complete compressor. You can find them used. It's a little tight, but I've changed one while the compressor was still on the car (2.0 auto). One nut and a couple of snap rings.

Ohm out the connector to the clutch - I believe it should be about 4ohms.
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Old 06-19-2009, 08:15 PM
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Check this link out before purchasing a clutch. Mine wasn't working either.
I replaced the fuse panel on the battery. Cost for part was $100 at the dealer.
No Compressor Operation in Volkswagen New Beetle
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Old 06-19-2009, 11:24 PM
Twizzler
 
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Car: 2002 NB 1.8 GLX RED
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I checked that and have already replaced the whole fuse block on top of the battery because of teh infamous melting alternator line. What is the second red wire go to? On my car it is in poor shape now as well as the black alternator line. This image shows the wires in order for reference.
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Old 06-22-2009, 03:34 PM
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Car: 2002 NB GLS TDI
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The other common problem is that the Fan Control Module is inoperative, which prevents the compressor and cooling fans from operating. If your engine cooling fans do not engage, this is the most likely culprit. Fan Control Module is about $90 and takes roughly 1 hour to change.
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