AC/Heating House of Cards nightmare - Club Touareg Forums
 
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post #1 of 7 Old 03-17-2019 Thread Starter
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AC/Heating House of Cards nightmare

So this issue really has my wheels spinning. I live in Albania. My Touareg 2008 3.0 Tdi air conditioner has been acting strange. The heat was working fine. The AC would turn on and work for about 30 seconds and then a deep humming noise would start from behind the dash towards the glovebox and the airflow would cut to basically 0 until I turned it off or switched back to heat. The sound is just like if you put a sock in a vacuum cleaner. I took it to a ‘shop’ (options are limited here) and they tested the gas in the compressor which checked out as normal. They then told me it sounded like the motor below the glovebox. They decided for whatever reason it was a good idea to give that a couple good whacks and said it sounds like its blocked. Come back in a few days and their electrical guy can fix and unblock the motor they said. I drove home and now the heater as well as the AC are not working, both having the same problem. Starts off ok, and then loses power and airflow when the loud humming begins. It sounds like a person trying to scream and hum with their mouth closed. At least before the heat was functioning! I just put in a new cabin filter prior to taking it to the shop. Im not exactly a DIY kinda guy but im really tempted to disassemble the blower fan below the glovebox and see what is up. This sucks.

Albania/Kosovo
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post #2 of 7 Old 03-17-2019
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The fan motor itself is know to go bad. Eventually the carbon brushes inside them wear down and the fan starts to act up. Generic part is 80 to 100 dollars. About 250 for the part from the dealer.

We have had a rash of the fan motor speed controller, called a bitron in the VW world, going bad. Generic part is 30 to 40 dollars.
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post #3 of 7 Old 03-17-2019 Thread Starter
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Quote:
Originally Posted by nickyt View Post
The fan motor itself is know to go bad. Eventually the carbon brushes inside them wear down and the fan starts to act up. Generic part is 80 to 100 dollars. About 250 for the part from the dealer.

We have had a rash of the fan motor speed controller, called a bitron in the VW world, going bad. Generic part is 30 to 40 dollars.
Ive looked at a couple DIY videos for these. If I can get the generic part I think I will try to tackle it myself. It looks relatively simple, taking the fan motor out and replacing it with the new, lining it up correctly and reconnecting the plugs. Ive even read a little bit about people repairing and changing just the carbon brushes, that is probably a little out of my comfort zone.

This other thing the motor speed controller, bitron as you called it. I googled it and it looks like a little black box? Or theres a circut board looking thing. I have no idea where these are at on the treg

Albania/Kosovo
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post #4 of 7 Old 03-17-2019
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The bitron is part number 7L0907521 and is located directly behind the glovebox.


www.clubtouareg.com/forums/f43/ac-heater-blower-motor
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post #5 of 7 Old 03-17-2019
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The blower motor is not too difficult to replace. IIRC, it's 5mm bolts and you'll need a deep (long) socket or an extension. Then wiggle the motor housing out and wiggle the new one back in. For me, it wasn't worth the hassle to try to replace the brushes and risk having to do the job all over again because it didn't work the first time.
:- /

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post #6 of 7 Old 03-18-2019
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Here is more info on the bitron. clubtouareg.com/forums/f43/heater-fan-wont-shut-off
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post #7 of 7 Old 03-18-2019
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