My Audi 2005 Air con system will not blow cold air is this anything to do with the vent at the front of the vehicle that creates an airflow

fogging inside a car out of vents
with aircon happens sometimes

nothing wrong with the air con system at all .....fog will clear

scientific cause ...cold air hits hot air
the internal temp of the car is higher than the external temp
or other way round
causing fog

Have you checked the blower fuse?

You have problem in 1) Your air flow system have gone down and some plastic valves that opens to cold position or to hot position is broken. Solution: remove panel and check this plastic valves that controls airflow.
2) Your heat salon radiator is very poor and can't blow in all directions. Solution: replace salon heat radiator.
3) Your cooling system don't have good limit of coolant. Solution: fil it to min - max position.
4) Your cooling system isn't bleeding. Solution: make system without air in it.
Hope this will helps.

You need to have a repair shop fix the problems
you put in there, from trying to work on an
A/C system without proper knowledge or equipment

I recharge unit for your ac

I've have never heard of a "only cold air system", but hey, nothing surprises me anymore. try replacing the control unit in the front. hopefully that will take care of the problem. If not you need to check your blend valve. (headache depending on location)

You may need to reset basic settings for the control module using a scan tool , reading the logged faults stored in the control module is needeed also .

If the front is still blowing air but not air conditioned air than it is likely that a flap that controls airflow to the front has failed. The rear would still work as it is controlled by an auxiliary control.

If there is no air coming out of the front at all I would suspect a blower motor as the rear has it's own blower.

Either way a scan tool that is able to access the HVAC system is going to be the only to accurately diagnose this problem.

Hello according the the manual, the back vent are to blew cold air only..the fronts vents are suppose to the entire car...

I am having/had the same problem. My rear heater has not worked the last 2 winters, still trying to figure that one out. But I think I solved the front heat problem myself. The heater was blowing cold air while idling and hot air when the car was moving.

I jacked up the front of the vehicle, took the cap off of the reserve tank for the radiator, turned the car on and ran the heat (AC off) for 15 minutes. This is supposed to release any air bubbles in the coolant system and I did see air bubbles emerge as I was watching (this might be normal occurance, I'm far from a mechanical expert). Anyway, this did not immediately solve the problem, still blowing cold air as it sat there idling after 15 minutes. Dejected, I put the cap back on, lowered the vehicle and resigned myself to taking it to a dealer.

But a funny thing happened the next day, the coolant level was a lower (no leaks on the floor) so I filled up, and sure enough, when I started the car and let it warm up a little, hot air started coming out of the heater!!!

As far as my wife knows, I fixed the problem for the price of a bottle of coolant, so I am a hero...but at first I thought it didn't work. Here we are a month later and still blowing warm air and haven't had to replace any more coolant...the internet is a wonderful thing!

Hope this works for you, and I hope I can figure out my rear heater problem as well.