I have a friend with a 3 year old Audi A6 (2.7 diesel I think) that has had
a problem for a long time now with the aircon intermitantly going a bit
haywire and either blowing very hot or very cold.

Garage is at a loss as nothing shows up in the computer logs (and I guess
intellegent guesswork/diagnosis is beyond them) and because the problem is
only intermittant and typically never happens when it's taken to the dealer.

Are there any common known problems with this car's aircon?

TIA

Tim

On Thu, 25 Jun 2009 11:05:38 +0100, Tim Downie
wrote:

I have a friend with a 3 year old Audi A6 (2.7 diesel I think) that has
had a problem for a long time now with the aircon intermitantly going a
bit haywire and either blowing very hot or very cold.

Garage is at a loss as nothing shows up in the computer logs (and I
guess intellegent guesswork/diagnosis is beyond them) and because the
problem is only intermittant and typically never happens when it's taken
to the dealer.

Are there any common known problems with this car's aircon?

TIA

Tim


If it's random then you'll want to plug it into Vag-com & see what's going
on, normally it's a sticky flap or motor but interrogating it's a lot
easier than removing the dash.

Duncan Wood wrote:
On Thu, 25 Jun 2009 11:05:38 +0100, Tim Downie
wrote:

I have a friend with a 3 year old Audi A6 (2.7 diesel I think) that
has had a problem for a long time now with the aircon intermitantly
going a bit haywire and either blowing very hot or very cold.

Garage is at a loss as nothing shows up in the computer logs (and I
guess intellegent guesswork/diagnosis is beyond them) and because the
problem is only intermittant and typically never happens when it's
taken to the dealer.

Are there any common known problems with this car's aircon?

TIA

Tim


If it's random then you'll want to plug it into Vag-com & see what's
going on, normally it's a sticky flap or motor but interrogating it's
a lot easier than removing the dash.

Garage have already done that, hence the reason I said "nothing shows up in
the computer logs".

Tim

On Thu, 25 Jun 2009 11:43:39 +0100, Tim Downie
wrote:

Duncan Wood wrote:
On Thu, 25 Jun 2009 11:05:38 +0100, Tim Downie
wrote:

I have a friend with a 3 year old Audi A6 (2.7 diesel I think) that
has had a problem for a long time now with the aircon intermitantly
going a bit haywire and either blowing very hot or very cold.

Garage is at a loss as nothing shows up in the computer logs (and I
guess intellegent guesswork/diagnosis is beyond them) and because the
problem is only intermittant and typically never happens when it's
taken to the dealer.

Are there any common known problems with this car's aircon?

TIA

Tim


If it's random then you'll want to plug it into Vag-com & see what's
going on, normally it's a sticky flap or motor but interrogating it's
a lot easier than removing the dash.

Garage have already done that, hence the reason I said "nothing shows
up in the computer logs".

Tim


They said they'd already done that on my friends Polo, it still had all
the faults visible when I plugged the laptop into it.

"Tim Downie" wrote in message
...
Duncan Wood wrote:
On Thu, 25 Jun 2009 11:05:38 +0100, Tim Downie
wrote:

I have a friend with a 3 year old Audi A6 (2.7 diesel I think) that
has had a problem for a long time now with the aircon intermitantly
going a bit haywire and either blowing very hot or very cold.

Garage is at a loss as nothing shows up in the computer logs (and I
guess intellegent guesswork/diagnosis is beyond them) and because the
problem is only intermittant and typically never happens when it's
taken to the dealer.

Are there any common known problems with this car's aircon?

TIA

Tim


If it's random then you'll want to plug it into Vag-com & see what's
going on, normally it's a sticky flap or motor but interrogating it's
a lot easier than removing the dash.

Garage have already done that, hence the reason I said "nothing shows up
in the computer logs".

Find another garage then...!

Seriously, if it is blowing hot, and yet selected cold, it is quite easy to
see in the live data, what actuator or sensor is feeding back the wrong info
to the climate etc.

Tim.

Tim.. wrote:
"Tim Downie" wrote in message
...
Duncan Wood wrote:
On Thu, 25 Jun 2009 11:05:38 +0100, Tim Downie
wrote:

I have a friend with a 3 year old Audi A6 (2.7 diesel I think) that
has had a problem for a long time now with the aircon intermitantly
going a bit haywire and either blowing very hot or very cold.

Garage is at a loss as nothing shows up in the computer logs (and I
guess intellegent guesswork/diagnosis is beyond them) and because
the problem is only intermittant and typically never happens when
it's taken to the dealer.

Are there any common known problems with this car's aircon?

TIA

Tim


If it's random then you'll want to plug it into Vag-com & see what's
going on, normally it's a sticky flap or motor but interrogating
it's a lot easier than removing the dash.

Garage have already done that, hence the reason I said "nothing
shows up in the computer logs".

Find another garage then...!

Seriously, if it is blowing hot, and yet selected cold, it is quite
easy to see in the live data, what actuator or sensor is feeding back
the wrong info to the climate etc.

Yeah but, you say "live data". This problem is intermittant and never
happens when it's taken to the garage (as is the way with these things).

Tim

"Tim Downie" wrote in message
...

Yeah but, you say "live data". This problem is intermittant and never
happens when it's taken to the garage (as is the way with these things).

While not exactly the cheap option, (but no more than an hours labour at a
main dealer) I've heard good reports on these;
http://preview.tinyurl.com/nvyrwf
Just plug it into your OBD socket and it records all error codes over
24hours, then plug it into your USB on the PC to view the record.

I'm just waiting for a dodgy intermittant problem so I have an excuse to buy
one


--

Tony Bond / UncleFista

www.bradford7.co.uk

Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...

Tony (UncleFista) wrote:
"Tim Downie" wrote in message
...

Yeah but, you say "live data". This problem is intermittant and
never happens when it's taken to the garage (as is the way with
these things).

While not exactly the cheap option, (but no more than an hours labour
at a main dealer) I've heard good reports on these;
http://preview.tinyurl.com/nvyrwf
Just plug it into your OBD socket and it records all error codes over
24hours, then plug it into your USB on the PC to view the record.

I'm just waiting for a dodgy intermittant problem so I have an excuse
to buy one

Now that looks interesting. Just the sort of diagnostic tool a main dealer
ought to have for these intermittant problems.

Any idea if it can be left running for more than 24hrs and then unplugged
after the problem shows itself? I'm guessing it would hold the most recent
data and ditch the data 24hrs old.

Tim

"Tim Downie" wrote in message
...
Now that looks interesting. Just the sort of diagnostic tool a main
dealer ought to have for these intermittant problems.

Any idea if it can be left running for more than 24hrs and then unplugged
after the problem shows itself? I'm guessing it would hold the most
recent data and ditch the data 24hrs old.

I'm not sure, I'd imagine that if it could record more than 24 hours, it'd
say so in the sales blurb.
It's true though, it'd be perfect for main dealers to hand over to their
customers who have intermittant problems...

--

Tony Bond / UncleFista

www.bradford7.co.uk

Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...

Tony (UncleFista) wrote:

"Tim Downie" wrote in message
...

Yeah but, you say "live data". This problem is intermittant and never
happens when it's taken to the garage (as is the way with these things).

While not exactly the cheap option, (but no more than an hours labour at
a main dealer) I've heard good reports on these;
http://preview.tinyurl.com/nvyrwf
Just plug it into your OBD socket and it records all error codes over
24hours, then plug it into your USB on the PC to view the record.

I'm just waiting for a dodgy intermittant problem so I have an excuse to
buy one


I doubt that it would rcord aircon faults though, as they won't register
on generic OBD-II.