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VW B5 Passat TDIs This is a general discussion about B5 Passat(>98 (2004-2005 in North America)). Non TDI related postings will be moved or removed.

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Old September 11th, 2018, 15:09   #1
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Join Date: Feb 2014
Location: Scottsdale, AZ
Fuel Economy: Average 45 mpg, often pull a light trailer best tank 52 worst tank low 30's Towing
Default Ac compressor clutch went out?

Pretty sure my AC compressor clutch went out on me, heard a squeal yesterday when warming up, ran to the car to turn off AC to try and tell me if it was the culprit, however it stopped before I got to it....TODAY driving I hear the squealing again and then stops and my AC stops working, I smell burnt clutch and after inspection, the clutch seems loose in the compressor and there is debris around there. SO ya clutch is gone obviously, what im concerned about tho, is that when I run the AC the clutch seemingly engages but wont get cold air out of the vents (only tried it for 30 seconds or so).....wondering if my clutch would have taken out my compressor? I don't want to buy and install a new clutch when I need a whole new compressor.....Oh yeah just evacuated and refilled the AC with 600 grams three days ago....
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Old September 13th, 2018, 11:52   #2
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Join Date: Jun 2000
Location: Bridgewater,Ma.,USA

Assuming the controls are otherwise working (relays, etc) either, 1. its the clutch coil, 2. the clutch itself, or 3. the compressor.

1. The resistance of the clutch coil, from the 2 pin connector should be around 3 ohms or so. If its high then there will not be enough energy to pull in the clutch.

2. If the clutch seems loose then its possible the clutch splines stripped. This happened on my golf, once. http://forums.tdiclub.com/showthread.php?t=391119

3. Also, IIRC, the center of the clutch, connected to the compressor, should turn relatively easily, with the car off. If it doesn't I think you may need a compressor. It's likely that you need to pull the clutch to be sure that compressor will spin since you won't know if the splines are stripped on the clutch.

If the coil is OK, you can replace only the inner part of the clutch.

My money is on #2
2005 Passat Wagon
2004 Jetta Auto
2003 IBW
1999.9 Golf (for parts)

Last edited by johnboy00; September 13th, 2018 at 11:54.
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Old September 14th, 2018, 16:15   #3
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Join Date: Mar 2007
Location: Western US

Why did you evacuated and refilled the A/C? It would seem to me that could be related and you might have experience a compressor failure, not just a clutch failure.

- Richard-
2005 Passat TDI GLS Wagon 207,xxx miles - Chainless
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