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Audi TT The Audi TT line, in both the coupe and roadster combines Audi's All Wheel Drive performance with the feel of a European sports car.

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  #1  
Old 04-20-2009, 06:32 PM
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Default Fan relay problem?

Hi guys,

need your help here.

My A/C is not pushing cold air and my car overheats if it does not move after a while. With the So Cal weather getting hotter I need to get this resolved asap.(it hit 101 degrees yesterday and today)

My conclusion is that the fans are not working for some reason.

1) Where is the fan relay located? Does VAG detect relay problems?

2) Is there a DYI for freon refill?

Thank you all, much appreciated.
  #2  
Old 04-21-2009, 03:18 PM
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Default

Hey azn..I've been dealing with the same problem since last summer..It's your Fan control module located underneath the batter..Thing is though..I've replaced my module 3 times now. Either I bought crap modules, fans are pulling to many amps, or the fan motors themselfs are shot...Now i've troubleshooted everything i possibly could have..the radiator fans dont run on a fuse themselves. The module is what gives them power.These modules are pretty easy to replace.. it's a little rectangular box. When you take out your battery, take out everything that the battery is connected to etc. the module is under the metal wall the battery sits on and there are two screws holding it in. I'd suggest purchasing your module from germanparts.com the part number is
1J0919506K it's like 115 bucks. Now if you have the same problem as i do, then I would suggest having someone check to see if your radiator fans are actually working and not pulling to many amps.. otherwise you could possbily short out your new module.

p.s. shut your car off when sitting and take routes you know aere that busy..don't want to **** anything up..Audi tech told me not to even drive my car but screw that.
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2001 Audi TT 225, even the M.I.L.F.S Wink and Wave!
  #3  
Old 04-23-2009, 08:24 PM
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did you check the fuses on top of the battery?
  #4  
Old 04-28-2009, 02:02 AM
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I did, idk if azn did tho..
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  #5  
Old 05-20-2009, 11:13 AM
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Default

Yah man thanks guys!

I finally had the chance to take a look at this. I found the fuse on top of the battery burnt out. I replaced all 3 fuses with better quality ones; the AC+fans came back online!

I did buy the relay however but I guess I will hold on to it till it fails...

THANKS A MILLION!
  #6  
Old 05-20-2009, 03:47 PM
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Wish mine was that easy.. i"m still having problems heh..Put the new module in and the fans are still out..Good news is the ac and the auxilary water pump are working again.
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  #7  
Old 06-12-2009, 02:56 PM
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Default Same TT problem

My 2001 TT is doing the same thing A/C and rad fan not working - Changed thermoswitch and relay module - still not working. No power to Thermoswitch but power after we changed the module but then imediatealy after power to switch stopped when A/C turned on.

Help!!!
  #8  
Old 06-12-2009, 10:31 PM
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Default

Same thing happened to my car.
The fan switch unit was fine, but the actual driver's side fan was busted.
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  #9  
Old 06-15-2009, 03:57 PM
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Default

My Main Coolant Fan isn't working anymore. I will check the fuses and see if that helps. Otherwise should I get a new fan or a relay first. Those things aren't cheap and I hate to replace both if I don't have to. My Temp gauge is passing the middle mark and that's the only reason I checked the fan. The secondary fan is working but the primary isn't.
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'04 BR Audi TT 225, 42DD DP, BlueFlame Catback, Revo Stage2, ****, Modshack BoostMachine, 4bar FPR, Forge Splitter DV, BPi Flowstack with AEM Dryflow 5" Filter, DS Shortshifter, Koni FSD with Eibach Pro Kit, Neuspeed 19mm Rear Swaybar, LiquidTT
  #10  
Old 06-25-2009, 06:30 PM
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Default

are the fuses located with the rest of the fuses? what is the "black box" with wires that sits on top of the battery?
i haven't seen my drivers side fan run even with the temp gauge 3/4 of the way to H. i would like to check the fuses before i take it to be diagnosed but i don't know were they are.
  #11  
Old 10-04-2009, 10:40 PM
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Default Same problem, overheating at stop and no cold a/c

Ok I see no post recently to this issue. I am having the same problem, seems my 2002 Audi TT Quatro 225 Turbo was overheating at stop until I got her back on the road and going again. Took the coolant down a notch or two. Also my A/c was blowing hot air, not cold. Fan works in the car just not cold. I found the box on top of the battery and just pinched the clips on the right and left side and lifted. 3 fuses on the right, cant miss them. I haven't pulled them yet. Want to do it in front of my local NAPA and pick up the fuses there.

Wish me luck fingers crossed.

On another note though, the **** on the left of my a/c cracked apart in my hands. **** still works just seem to find out that these things are pretty delicate. Anyone have any experience on replacing the a/c *****?
  #12  
Old 05-19-2010, 11:26 AM
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Default Fuses?

My Airconditioning is not blowing cold air, and the compressor is not kicking in or spinning, should i try the fuses on top of the battery or the relay box?
  #13  
Old 05-21-2010, 10:26 AM
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The key always seems to be the fuses in the box on top of the battery. If one burns out, it's almost sure to be a short somewhere.
  #14  
Old 05-22-2010, 12:24 AM
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Default Fuses #2

I tried replacing the three solid green 30 fuses with three red clear fuses. Nothing happened with the ac, My battery went bad today after changing those fuses. Are the green fuses a special kind of fuse


Orlando
  #15  
Old 05-24-2010, 11:56 AM
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No, nothing special about the green fuses. I had the same issue with dead fans and a/c compressor. Found one of the green fuses was simply loose. Fixed that and now all is working but my a/c cycles from cold to hot. Still looking into that one.
  #16  
Old 04-11-2011, 02:44 AM
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What has happened to you overheating car. My TT MK2 is suffering the same problem, fan does not automatically run at 90 degrees.
  #17  
Old 03-27-2012, 08:47 PM
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i stopped in my favorite hot-rod shop, APTuning independent audi-vw specialist while i was in the area, lebanon pa about 55 miles from home, i got a diagnostic for my concern of not seeing any fans run since i got my 01 TT in dec 2011, they said though the lo-speeds in the fans run the high speed function does not. prolly why i have not had overheating issues yet with the still cooler pennsylvania weather, a well spent $56.71, now i can order one and drive with peace of mind, i hope

Last edited by rodhotter; 03-27-2012 at 08:50 PM.
  #18  
Old 03-28-2012, 12:31 PM
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Default Cooling Fans

Both of the fans on my TT'01 start to run automatically at 94-95 degC, so bi would be halfway between the center mark and the 3/4 mark. It is very consistent at that level. The level is not stable though that if the ride is continuous the temp will be at the center at about 78-80 degC and in traffic at the 95 degC mark. Is this normal?
  #19  
Old 03-29-2012, 09:33 AM
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Default

just a little update, i ordered the fan control module as well as the fan switch, only $15 more, autohausAZ shipped it the same day, good price and free shipping
  #20  
Old 03-30-2012, 10:17 AM
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Default Did it work?

Did the relay improve anything? Cooler? I have not heard of the fan switch, where is this found, at the radiator's side?
Old 03-30-2012, 10:17 AM
 
 
 
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1j0919506k, 2001, a4, a6, ac, audi, control, fan, fans, module, radiator, relay, replace, tt, working


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