Weird Air Con problem

[silverfox.mike]

Noticed the other day that my a/c was behaving strangely on my 57 plate Q7 3.0d S-Line.

I'd set both L/H and R/H temps to LO. Whilst cold air was coming out from the driver side vents, I had hot air coming out from the passenger side vents.

In the end I had to set the following on the passenger side:

Fan speed = 1
Temp = Lo
Direction = Front vents

and then manually close the front vents on the passenger side to get the temp half way bearable.

2 days later I tried turning on the passenger front vent in the centre console and found to my relief that the a/c was functioning again. I've since set L/H and R/H sides to synchronise and all is good with the world.

The day before the issue, I was driving locally with the panoramic roof fully open, and therefore I had enabled ECONomy mode on the A/C.

Any thoughts on whether or not I've got the start of a long term problem?

Thanks in advance

Mike

[Sean Fleming]

Hello Mike!

I can't offer any help at the mo, but I have a very similar problem in my 55 plate A6 3.0 Tdi. Here's what happens with mine.. after about 30 mins of driving blows hot air out of every vent (including the ones in the rear of the car) except the ones in the centre console. It's ice cold coming out of the middle, but tropical everywhere else. I intend to get to the bottom of it and if I get any answers I'll post them here.

Cheers,

Sean

[Sean Fleming]

Found this, might be useful. Will have a chat with the guy who looks after my car... Audi A6 - Air con blowing very hot | Technical matters | Back Room Forum | Honest John

[Sean Fleming]

I also found this. You'll need to scroll to Page 4 of the comments thread and look for a reply from a user called rstoer with photos and an explanation.

HVAC Blows very hot air on side vents - Page 4 - AudiWorld Forums

[silverfox.mike]

Thanks Sean

I need to book in for an annual service so will mention this 'fix' to them. Hopefully the Q7 has a similar assembly to the A6. Oddly enough if anything I'm getting only cold air from the passenger side at the moment.

Mike