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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old May 13th, 2012, 18:23   #766
ymz
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Originally Posted by Lurchalicious View Post
Their list price on the VDO unit was over $400 - all at the price of 128.99
How are they supposed to stay in business doing things like this? Volume?


Yuri
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Old May 13th, 2012, 20:31   #767
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Dan,

I tested my car today AC switch on / ignition on ( motor not running ) both fans came on. Good to go. This is a great write up.


However on my daughters 2000 Golf 2.0 gasser did the same test any nothing. Then I started the car and after approx. 60 seconds the small fan came on but not the large one. then it cycled on/off about every 2 minutes. My daughter said the large fan hasn't been running when she checked it.
So I dissassembled the large fan an noticed one of the brushes heated up and melted the plastic bracket so I cleaned the melted area up best I could so the brush could slide in/out easily. I reassemble and the fan, and after starting the engine it work along with the smaller one.
When the engine is running the AC clutch never disengaged but the fans contnued to cycle on/off every 2 minutes. Engine cold.
Does a 2.0 Gasser AC operate differently then a TDI???

Thanks
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Old May 14th, 2012, 04:45   #768
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Terry,
The 2.0 gasser controls appear identical. There is no reason I can see for cyclic fan operation. Sometimes you see the fans shift to fast in hot weather, but never off.

Do her fans start even with the key on engine off, now, as they should?
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Old May 14th, 2012, 20:57   #769
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How are they supposed to stay in business doing things like this? Volume?


Yuri
No idea - didn't know how they were selling the doorman unit for over 200 when auto zone up the street had it for a hundred less.

now the VDO - i only saw the "list" price on my receipt - looking it up on the website it sells for 280; big difference but hey - Oriley people work on commission, autozone doesn't - so its been in my experiences that the people at Oriley want my business and will compete for it... or perhaps I just had a lucky break.
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Old May 15th, 2012, 06:21   #770
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Terry,
The 2.0 gasser controls appear identical. There is no reason I can see for cyclic fan operation. Sometimes you see the fans shift to fast in hot weather, but never off.

Do her fans start even with the key on engine off, now, as they should?
The morning I tested both of our cars it was cool outside. My fans came right on with engine off, and her car did not. Then when we fired up her engine I had her turn her AC on and the fans didn't come on until about 30 seconds then cycled back off in about 90 seconds or so, and then kept cylcing at that interval. All the while the clutch never disengaged.
I think I'm going to replace the large fan. One of the brushes is only about 5/16" long it keeps getting hung up in the bracket.

She is up at USC taking a Maymester, if you get a good opportunity one weekend I'll run up there and we can bring it by if you don't mind looking at the GASSER.

BTW her AC is colder than any car I've been in.

Edit: I'm curious what the fans do once the car has been running for a good while??
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Old May 15th, 2012, 07:03   #771
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For you Terry, I'll look at a gasser.

It sounds to me as if only her fast speed fans are working, neither slow speed fan. We can check it out. The AC will work fine. The compressor will be working at higher than normal pressures and temperatures, and so its life will be shortened.
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Old May 15th, 2012, 11:41   #772
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Thanks for the post, fixed one of my fans this weekend, piece of cake with your pics. My fan setup was a little different, but it was a brush hanging up in the holder that caused the fan to stop working.

Why isn't this original post in the FAQ/DIY section????
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Old May 15th, 2012, 18:40   #773
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For you Terry, I'll look at a gasser.

It sounds to me as if only her fast speed fans are working, neither slow speed fan. We can check it out. The AC will work fine. The compressor will be working at higher than normal pressures and temperatures, and so its life will be shortened.
Thank you Dan that's awsome of you. I know you hate the smell of
gas.

I will do the slow speed test before I bring it over and see what I come up with. I probably won't get a chance to run it by for a few weeks. But I'll try to do the test this Sunday afternnon if possible on my way through.
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Old May 22nd, 2012, 05:29   #774
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Thanks for this thread, guys! My A/C quit blowing cold air the other day and searched and found this thread. Seems my driver's side fan has broken the plastic "hub" away from the motor shaft. It sound like the motor runs, but the fan just sits there all loose and floppy. I ordered a Doorman replacement unit for about $90 shipped - should arrive tomorrow. I'll get that fan replaced and then see what else is screwed up.
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Old May 22nd, 2012, 10:59   #775
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I have a 2000 new beetle TDI 1.9
I turned my key on (not the motor) and turn my AC and the fan on low. The AC button lit up, but the cooling fans did not come on, neither one. Could this be why my AC isn't working?
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Old May 22nd, 2012, 11:10   #776
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The answer is maybe.
Start the car and look at the AC clutch, is it locking in? Is the center of the pulley turning, or just the outside edge?
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Old May 23rd, 2012, 11:50   #777
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Glad I stumbled upon this thread. Driver side fan not working after following simple test. Seems seized when trying to rotate the blades. Picking up a new one today. Hopefully didn't stress the A/C system that much this season. Also checked my brother car and his is fine. Thanks for a great thread DanG144!
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Old May 23rd, 2012, 14:14   #778
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Ordered two large fans for both of our cars....both of the large fans fail the test. Auxillery fans work great though!
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Old May 25th, 2012, 12:03   #779
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Checked my fans last night and sure enough the fan on the driver's side is not working. I spun the fan by hand and it wasn't exactly smooth to say the least. I am picking up a new fan after work today and will replace it tonight. Glad I found it now as I have a 1,600 mile round trip coming up in a few weeks.
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Old May 25th, 2012, 12:32   #780
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Default A/C worked for 10 minutes after New FCM

I have an ongoing wicked problem with the A/C in my 2001 TDI Jetta with manual controls. I had no cooling fans and no A/C. Went through the diagnostic. Found that I had a bad driver side fan and replaced it. Both fans then worked when tested from the radiator sensor, but would not turn on with ignition on A/C + fan switch turned on.

Replaced FCM. Cooling fans worked and A/C turned on and worked for 10 minutes and quit. Vent temps were about 65 Degrees F. Measured from low side with cheap fill gauge while it worked (DID NOT ADD ANY REFRIGERANT) and pressure was about 35. Outside Temp was around 90 Degrees F. Then the cooling fans quit and A/C compressor shut down.

Cooling fans now turn appropriately when doing the test from the radiator sensor (and engage with Fuse 16 pulled), but neither the compressor nor the fans engage with ignition switch on or engine running.

What is the most likely cause? G65 Sensor reads duty cycle 31.6% @ about 92 Degrees outside temp. (I assume that the engine compartment is about 110 degrees).

Last edited by passinpumps; May 25th, 2012 at 18:27. Reason: Update
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