) A4's and A5's (I suspect others, too) have bad problems with radiator/condensor coolant fans not being operational. There is no DTC or MIL light that comes on for this. No overt warning at all. Very 2001 ford explorer sport trac manual pdf timely also. NarfBLAST March 22nd, 2009, 20:39 # 4 shagin'wagen Veteran Member Join Date: Aug 2007 Location: Sherwood Park, AB TDI(s Bora Fuel Economy: 5L/100KM I wish that I had the opportunity to use my AC. AC troubleshooting :Folks, a reminder. This thread is for solving electrical control problems in the Mk IV Air conditioning systems. If your clutch is engaging, and your fans are running, then you will not find your answer in this thread. Both fans ran, one screeched very briefly but I couldn't get forward quickly enough to determine which. _ Jetta Wagon TDI 2K3 Silver has gone to a new home, replaced by Behemoth 2012 BMW X5 35diesel. DanG144 March 24th, 2009, 17:48 # 9 TDIEB Member Join Date: Nov 2003 Location: MA, USA TDI(s 2003 Golf blue Fuel Economy: 53 / 46 Bad Fan? I checked my AC fans today and saw that (1) was running. Thanks Dan! I just ran out the garage and tested both fans run without starting the engine. Just pushed the AC button and set the fan speed to the lowest setting and checked under the hood. If your clutch is engaging and your fans are running, check out the Refrigerant Control Valve threads and the lost-foam-on-the-temperature-control dampers or flaps or doors threads. If your pressures are normal, look at the flapper doors, if the differential pressure is lower than it should. The passenger side worked but the drivers side was not working. Should they both run with the test that is for the M/T A4? March 24th, 2009, 18:01 # 10 DanG144 Veteran Member Join Date: Aug 2007 Location: Chapin, South Carolina, USA TDI(s 2005 A4. While it could be a bad controller, it is very likely the fan itself. Dan DanG144 Marc). To avoid this scenario check your fan operation every time you check under the hood (every refueling, right?) Manual AC (as opposed to Climatronic AC or Climatic AC -the transmission type is immaterial) cars, push the AC button in, place a fan in slow and. 2) The second fan's slow speed operating mode quits; no one notices. The AC compressor is running even hotter and at higher pressures. When the vehicle is not moving, the pressure builds up to the high pressure point on the refrigerant pressure sensor. Then again, I rarely use my AC and I'm perfectly happy rolling down the highway or in town with the windows down. I'll still look into it though, I like it when things work and my dad loves the AC. WavetracLSD 3.16R P. 2001 Golf GL 2 door, All Stock. guess Ill be checking this later today. Thanks! _ Aaron Schnurren 2001 Golf 2 door. Knurren 2003 Jetta Wagon. TDI Service Closed. Growler March 23rd, 2009, 13:26 # 6 Doug Huffman Veteran Member Join Date. Your fans key off of refrigerant pressure signals, so the compressor must be good and be loaded in order for the fans to see a high enough pressure to start. During the engine output tests with VCDS, if there is a fan test (and there.