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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 January 21st, 2018, 20:40   #1801
wonneber
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Quote:
Originally Posted by Jester67 View Post
Any easier way to test this without VCDS?on a tight budget to to hours cut back at work?
If you spin the blade and it goes there is a problem with the brushes hitting the armature or a bad spot on the armature.

Test continuity with an ohm meter and turn the fan blade and watch for a change.
I've seen this a couple times on a few cars over the years.
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Old February 13th, 2018, 22:08   #1802
kurtisk
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I see references to the ambient temp sensor. I have a 2000 beetle and notice my outside temp gauge by the clock does not read accurately (sometimes in it reads -22 and I live in FL). Is this displaying the output from the same ambient temp sensor used by the AC and ECU, the one located by the driver's side fog light behind the grill?
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Old February 14th, 2018, 02:17   #1803
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I see references to the ambient temp sensor. I have a 2000 beetle and notice my outside temp gauge by the clock does not read accurately (sometimes in it reads -22 and I live in FL). Is this displaying the output from the same ambient temp sensor used by the AC and ECU, the one located by the driver's side fog light behind the grill?
Yes, it is that sensor that it displays. Before you replace the sensor, check the wiring going to the connector. You may have a damaged wire that needs to be fixed.
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Old April 9th, 2018, 12:18   #1804
artc
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2005 passat gls tdi replaced passenger fan also ac compressor control relay still passenger fan wont run.Driver side fan belt is not electric pulley driven. HELP!
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Old April 9th, 2018, 13:06   #1805
artc
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On my 05 passat tdi replaced passenger side fan also new ac compressor control relay fan wont turn at all driver side fan not electric its pulley driven HELP please.

Last edited by artc; April 9th, 2018 at 14:44.
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Old April 9th, 2018, 13:30   #1806
ToxicDoc
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for 4 years I've had intermittent AC operation. Finally found corroded terminals at the temp switch for the radiator. something worth looking at.
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Old April 9th, 2018, 14:46   #1807
artc
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air works until i come to a stop but fan in front of engine does not turn passenger side engine new fan new ac compressor control relay also help
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Old April 10th, 2018, 08:06   #1808
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What about the fan control relays? And what condition is the fan clutch in?

Jason
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Old April 22nd, 2018, 13:50   #1809
yvon g
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i just bought a 2014 jetta gas job, 2.0 liter. is the check for fans the same? turned key on, fan on low, a/c on.....fans don't come on....problem or different way to check a/c fan operation?
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Old May 31st, 2018, 23:46   #1810
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Just a small update. Found out both of my low speed fans (VDO) are shot again. Going to mess with them some tomorrow, been hearing a weird electrical sound so I guess it was one of the fans going.
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Old June 1st, 2018, 11:04   #1811
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Just a small update. Found out both of my low speed fans (VDO) are shot again. Going to mess with them some tomorrow, been hearing a weird electrical sound so I guess it was one of the fans going.


Turned out to be the fcm. In vw fashion my car has something strange that nobody else has so Iím stuck with a Chinese replacement. Too bad I canít change the connector for this one.


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Old June 10th, 2018, 23:43   #1812
Rinderle_77
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Thanks to this thread being a Sticky, I discovered that the fans were both fried, before cooking the AC system, on the bargain beetle I just recently purchased. Saved me a pile of headaches! Replaced the fan assembly this afternoon (with a Chinese Ebay setup for $80). I guess I got what I paid for, as the RH condenser fan made it about 10 min before there was smoke coming out the hub....like the shaft is spinning inside the fan hub and melting the plastic. Yes, they both spun freely after install, and worked as they should in the test. Ebay seller is sending out a new (free replacement) set tomorrow, so hopefully it was just a freak happening.
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Old June 11th, 2018, 00:04   #1813
AnotherPerson
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Thanks to this thread being a Sticky, I discovered that the fans were both fried, before cooking the AC system, on the bargain beetle I just recently purchased. Saved me a pile of headaches! Replaced the fan assembly this afternoon (with a Chinese Ebay setup for $80). I guess I got what I paid for, as the RH condenser fan made it about 10 min before there was smoke coming out the hub....like the shaft is spinning inside the fan hub and melting the plastic. Yes, they both spun freely after install, and worked as they should in the test. Ebay seller is sending out a new (free replacement) set tomorrow, so hopefully it was just a freak happening.

Itís not the fan that dies. The low speed resistor in the fan is too small. Vw designed it wrong and nobody ever put a larger resistor to handle it.
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Old June 11th, 2018, 14:52   #1814
tschager
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Well, once again the TDI Club and this blog saved the day. I drove the wagon this morning and the AC worked fine. Got in it this afternoon to take a drive and no AC. The blower fan worked fine but not cooling. I looked at the beginning of this very long thread and there was a troubleshooting step where you try to see if the cooling fans come on when the key's turned on while the motor's hot and to see if the other fan comes on if the AC button is pressed.



I did this and nothing, no fan, nothing. So, fuse 16 was the first check. Not bad. Next, the green fuses on top of the battery. The far left of the 3 fuses didn't want to come out of the holder so I got the pliers and it came out. Contact was black and there looked to be a little bit of melting on the fuse holder. Hmmm.



The fuse got cleaned and swapped with one of the others. The key was then turned on and guess what, the fans started working. Good sign. Now I started the engine and engaged the AC. Click and cooling started happening. Looks like my 16 year old electrical system may be starting to show a little corrosion and resistance. Good news is that all of the fuses are now cleaned and the AC system works - along with whatever circuits run from the other 2 fuses.



Thanks again, Guys!!!
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Old June 12th, 2018, 12:02   #1815
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Unless you want to service the fuse as often as you fuel the car, I would put replacing the fuse panel on your list of things to do.

Jason
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