Q5 HVAC works sporadically - AudiForums.com

Audi Q5 The Audi Q5, aerodynamics have never looked so good.

Thread Tools Search this Thread
Old 06-24-2017, 01:40 AM
pouletgloussant's Avatar
1st Gear
Thread Starter
Join Date: Jun 2017
Posts: 2
Default Q5 HVAC works sporadically

I have 2013 Q5 that of late has not been blowing air, either on AC or not. Last summer I had the same issue and I pulled the blower from under the glove box. I initially thought it was the motor controller, but after pulling everything and cleaning and testing, it ran perfect. So I put everything back together. During the winter (I'm in Chicago) there was a handful of times the heat wouldn't turn on. Now that it is summer, it's happening a lot.
Some things I have noticed.........
When it doesn't work , sometimes the fan will only turn up to 7 instead of 12 (the fan still doesn't turn on)
If I leave it on AC, the AC condenser will frost over (plus when it does work, the AC is nice and cold)
If it's cold outside, it has a better chance of turning on than if it's hot

So things that I am thinking........
1-vapor lock of some sort or something to do with the heat affecting the system
2-electrical issue, either in the controls or at the controller motor, be it a loose connection or something like that

Something I'd like to try but don't know how to do it or if it is possible, reset the car to factory defaults, like a hard reset.

Any ideas?

Thanks in advance, Greg
Reply With Quote
Old 07-15-2017, 07:24 PM
pouletgloussant's Avatar
1st Gear
Thread Starter
Join Date: Jun 2017
Posts: 2
Default Update


I fixed my HVAC issue. This is what happened........

On the Q5, in the engine bay are a bunch of cowls, one on top of the other etc. It turns out, that there is a little cowl, called the cowl water deflector that covers the air intake grate and ducting that leads to the blower motor. That cowl was missing, which let in water; a little here, a little there. The water would drip down and collect in the bottom of the blower motor housing. Over time this water caused the metal to rust and eventually seize up. This process was helped by the last major down pour I drove in. So much water came in, that it flooded the blower motor and then found a path to the carpet. On the 2011 Q5, there is a foam thing that covers the space behind the glove box, and upon pulling on that a cup or two of water came rushing out. If you go to Audiparts, under the HVAC system, you can see the exploded diagram that shows the part that covers the intake. It was plain as day when I looked at it.I installed a new blower motor and will install the cowl and that should solve all my problems. So, If you are experiencing water coming into you Q5, I suggest you look to see if your cowling is missing.
Attached Thumbnails
Q5 HVAC works sporadically-screen-shot-2017-07-10-9.07.54-pm.png  
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
ESP light turns on Sporadically on 2001 TT fenrong Audi TT 2 02-17-2012 11:25 PM
A6Q Cruise Control works sporadically altonachrome Audi A6 4 04-12-2010 11:34 AM
Fuel gauge reads sporadically... hcaudikeed Audi A6 2 11-16-2008 01:03 PM
"VAG-COM "too many communicarion errors" HVAC wkayl Audi A4 5 12-20-2006 02:35 AM
boggin/rough idle? only with HVAC off? elude Audi TT 2 04-23-2006 02:26 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Sponsors

All times are GMT -4. The time now is 11:37 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.