For some reason, the main dashboard vents on my '96 Audi A4 are not allowing air to flow from them. The underdashboard vents work and the window vents work. I've tried manual isolation of the main vents but still no flow. Thanks in advance,
There is an air flow motor that changes the vents and opens and closes them. unfortunitely you truly want to wish this not to be your issue because in order to change it the entire dash AND heater box must be removed from the vehicle as well as the a/c discharged.
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Windows fog up because of the humidity in the car. Run the ac and this removes the humidity from the air and the windows will not fog. If you do not have air flowing from the vents then check that the selection control is moving the vent doors . Check that the vacuum line is connected and not broken.
I would say that the control unit isnt switching properly,from the mode button moving the vents air flow direction,best bet is to try and swap a mates one and see if the mode changes the airflow to the main vents,it may be the unit isnt allowing the switching,i think theyre vacuum controlled
This is the correct solution..........replace the solenoid valve N239 as the electrical connection is affected by dampness. What happens is that the EGR valve is jammed open by the solenoid and this allows oxygen starved air into the cylinders (exhaust gas) and combustion is poor. Quick fix is to disconnect the vac hose to the EGR actuator and block the end with a self tapping screw or pencil. This will work for sure....
Maybe your dashboard vents are clogged, obstructed or stuck in close position somehow.
If not, check the air hoses that carry the cooled air to the main vents are not clogged, bent, ripped or simply detached. If its practical for you, check if they are correctly placed, clean and general conditions are ok if you can.
If above are not the issue, go to check outlets of the A/C unit, its filters for the possible reason.
No I am a mechanic at Audi. The problem is that the the air flow to the central tappets may be causing the air flow sensor to trip and that is why. Try putting a small amount of WD40 into the petrol and that will work, its a very common problem.
ELECTRONIC STABILITY PROGRAM ( ESP) LIGHT FLASHES TO INDICATE UNSTABLE DRIVING CONDITIONS....WHICH WILL ALSO COME ON IF YOUR ENGINE IS MISFIRES.. CHECK THE COILS AND SPARK PLUGS FIRST THEN GO FOR FUEL..INJECTORS...FUEL FILTER CHOKED..HOPE I WAS OF SOME HELP TO YOU..
you have air in the system!! you have to unbolt the filler tank and lift it 5 inch higer first. then loose the right hose on the heater core( this hose have and hole to bleed the system) and then put antifreeze until the antifreeze will go out of the hole then re install the hose to the heater core, then ajust the level correcty