Could be a number of things. Fan control module, bad fans, low freon.
I'm having issues with my AC fan on my 2006 AUDI A3 when turning on the AC. The fans don't go on nor does my AC.
the AC was working just fine last night. I checked the lines and they have no leaks.
what else can cause my fans not to turn on and causing my AC not to work?
do you guys have the diagram on for this:
I need to know what the relays and fuses are for. please post diagram indicating what is what.
I just changed the ac condenser too.
Last edited by B5.5SStone; 06-13-2012 at 12:45 PM.
We don't have very much information to go on here... the OP hasn't even included his model year, not in the post, and not in his profile.
The fans might no turn for several reasons:
-A seized compressor will cause the AC to be disabled, and as a result the fans won't turn.
-Low gas pressure (as sensed at the low pressure switch in the LP line) will cause the AC to be disabled, and the fans won't turn.
-A dead fuse won't allow the AC to operate, and the fans won't turn.
-A failed fan motor means the fan won't turn, and may disable the AC compressor, to prevent oveheating.
Start with the simple one. -Look at the AC compressor and see if the safety ring has sheared. -If so, your compressor has seized. -That's simple. (hint: SEARCH threads about AC compressor failures)
Here's a photo of a seized compressor... You can see the three points where the meta has sheared, around the central cap bolt (with the number "10" on it) at just past 12 o'clock, just past 4 o'clock and just past 8 o'clock in this photo.
-After that, you need a set of AC gauges to see what's going on with the system pressures, and a VAG-COM to see what the diagnostic controllers are telling you.
But that's all anyone can tell you (without simplistic guessing like "check to see if a wire from the battery is loose") without more information or diagnostic equipment.
ehh either power wire or ground wire that connects somewhere to the frame around the battery.
I had an issue where my fans would simply die randomly while driving. in 110 F it was unbearable.
after like 5 trips to the dealer, they finally found that I'm guessing the ground wire? was loose and the fans would shut off automatically due to the connection issue.
sorry if it wasn't as helpful as your post was... just trying to give the OP insight into similar issues w/ fans not blowing and their resolutions.
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Could still use more info... what model year for example... and an answer to what happens wit the button illumination (whether 'A/C' or 'econ') when pressed.
-VAG-com should be able to determine switch closure status etc on the control panel for example.
Get under the car and have a look at the compressor end-on... Start with 'the usual suspect'
I went to my local mechanic they told me that there is no electric current going to the ac compressor and he also said the ac compressor is seized up.
I came home and i did a full vag-com reading
and it said the following:
Any feedback would be appreciated.
Last edited by B5.5SStone; 06-29-2012 at 04:50 PM.
Seized compressor will do it. -As I mentioned earlier, when the control unit detects a seized compressor, it shuts down the A/C system.... hence their secondary observation of no control to the compressor.
Are they familiar with Audis? Might be safer to make sure they know what they're doing first... there are a number of cases of people replacing compressors without flushing out the debris first, and then the replacement dies quickly afterwards, and you get to do the whole thing all over again...
...This is a case of "do it RIGHT, do it once".