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D3 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc

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  #1  
Old 16th November 2011, 10:15 PM
S8 TYW S8 TYW is offline
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Location: Northop Hall, North Wales
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Default Heater Blower

Can anyone shed some light on this.

My Blower control has a mind of its own,
first thing in the morning it takes about 5-10mins for the blower
to activate, once on i have no control over the speed
of the blower, even if i turn the speed down on the mmi screen
it dosent change.

Anyone have any ideas? could this be a faulty resistor somewhere

Thanks
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  #2  
Old 17th November 2011, 08:42 AM
A8 Doc A8 Doc is offline
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Tricky one and i'll be honest do you have VAGCOM.

On most cars i've seen it's normally down to a faulty climate control unit. The lights change, but it doesn't send the correct signal.

Now the problem on here is the HVAC panel sits on the MOST network. And seems to be adjusting the MMI screen, therefore it is sending a signal..... in theory.

If it was me I would plug in VAGCOM and see if it shows the change via measuring blocks. This will tell you if it is truly sending the signal. If it is not, then replace HVAC.

I'm suspecting the heater motor though. I assume temperature is fine, just literally blower speed?
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  #3  
Old 18th November 2011, 12:41 PM
S8 TYW S8 TYW is offline
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Thanks for the reply.

Yes i do have vagcom, but havent really used it alot so how would i go about
seeing if these measuring blocks change?
i take it i would need to entry module 08 Auto HVAC
and then what?


Quote
(I'm suspecting the heater motor though. I assume temperature is fine, just literally blower speed?)


Yes the Temperature is fine, just the fans are the problem

Thanks
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  #4  
Old 18th November 2011, 03:40 PM
Godders Godders is offline
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Default

Quote:
Originally Posted by S8 TYW View Post
Thanks for the reply.

Yes i do have vagcom, but havent really used it alot so how would i go about
seeing if these measuring blocks change?
i take it i would need to entry module 08 Auto HVAC
and then what?
Yes it is 08 Auto HVAC but you'll find there's no published label file

However I have produced one which will give you all the labels for the various measuring blocks

Drop me a PM if you want it and I'll give you instructions where to save it to and how to use it.

Without it you won't be able to diagnose or check anything in the HVAC module, there's just too much info in there which means nothing without a label file

Note to self, I must send it to Ross Tech for inclusion in a future release
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2003 D3 A8 4.2 Atlas Grey -
Factory: Adaptive lights with coming home function, 19" wheels, Solar Sunroof, Bose, Nav, TV, Paddle shift sports wheel, sports suspension, sports seats, rear seats with electric lumbar adjustment, heated seats and climate all round, ski hatch, int light pack, auto dip/fold mirrors, voice command, cordless phone, wooden gear knob, towbar, power boot lid

After: LPG, AMI with HDD

Pending: DVB-T Tuner & fixing niggles
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  #5  
Old 18th November 2011, 08:09 PM
S8 TYW S8 TYW is offline
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Many Thanks for that i will PM you

Cheers
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  #6  
Old 18th November 2011, 08:38 PM
Godders Godders is offline
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Got your message and have PM'd you. We're only a stones throw from each other so it may be worth meeting up
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2003 D3 A8 4.2 Atlas Grey -
Factory: Adaptive lights with coming home function, 19" wheels, Solar Sunroof, Bose, Nav, TV, Paddle shift sports wheel, sports suspension, sports seats, rear seats with electric lumbar adjustment, heated seats and climate all round, ski hatch, int light pack, auto dip/fold mirrors, voice command, cordless phone, wooden gear knob, towbar, power boot lid

After: LPG, AMI with HDD

Pending: DVB-T Tuner & fixing niggles
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  #7  
Old 21st November 2011, 08:18 PM
A8 Doc A8 Doc is offline
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Glad you are getting sorted, agree you do need HVAC labels, I forgot they wern't on the D3.

If you meet up might be easier to swap HVAC panels and try that. It's very easy to do. Remove the ashtray and undo bolts IIRC... It's been a while/
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  #8  
Old 22nd December 2011, 09:54 PM
S8 TYW S8 TYW is offline
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Just a quick update on this......

Also like to thank bry for taking time to help in this problem,
hope you and your family have a good Xmas

OK after some trawling on the internet, and reading a few similar problems
regarding the fans having a mind of there own, i decided to change the blower module which is located next to the fans themself.
End result is all working perfect

Once again bry many thanks

Tony
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  #9  
Old 23rd December 2011, 10:14 PM
Godders Godders is offline
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Tony,

It was a pleasure though frustrating we couldn't fix it and ultimately required the blower module replacing, not cheap as I've just found out.

Looks like I now have a similar problem (must be catching), though I think mine is down to the fan so I'll be replacing that over the hols - it just arrived today.

Something else to add to the small claims claim , that's going to be an interesting day !

Have a great Christmas and New Year too.
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2003 D3 A8 4.2 Atlas Grey -
Factory: Adaptive lights with coming home function, 19" wheels, Solar Sunroof, Bose, Nav, TV, Paddle shift sports wheel, sports suspension, sports seats, rear seats with electric lumbar adjustment, heated seats and climate all round, ski hatch, int light pack, auto dip/fold mirrors, voice command, cordless phone, wooden gear knob, towbar, power boot lid

After: LPG, AMI with HDD

Pending: DVB-T Tuner & fixing niggles
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