There is a cable on the passanger side of the center console that goes up under a plate behind the glove box. Remove the glove box and the plastic plate and follow the cable. The cable attaches to a little metal rod that adjusts the heater temperature. If this cable becomes separated from the rod then it will snap the rod back to the "cold" temp selection. Simply reattach the cable to the rod and adjust the temp. But, you will probally have to do this every time you change the temp settings on your heater control panel. So, I suggest you change it to the hot setting in the winter and leave it there until you want to change it again to cold in the summer.
Check the fuse. Check the blower speed resistor. Check the blower speed control switch.
If you have no blower speeds at all check the fuse, then check the blower motor switch and electrical plug for a melt down situation, then check the blower motor itself.
Bad fan motor? Check to see if you are getting power to it Bad Switch? Bad fan relay?
check your fuse, check the wiring to the blower or the blower motor itself could be shot.
Check the fuse and relay to start. If these are ok, then check the blower switch, the resister, then the blower motor itself.
The fuse. The blower motor speed resistor. The blower motor relay. The blower motor switch. Check for power at the blower motor connection.
Start by checking the Audi's blower motor fuse. Check the blower switch, resister, and lastly, check the motor to find the problem.
Check your servos.
Check the resistance on the blower motor.
Check to see if you are getting power to blower motor - if so replace blower motor If not check fuse, switch, resistor pack.
Check the fuse and relay first. Then check the blower resister, then the blower motor itself. One of these is probably the cause of the failure.
The first thing that you need to check is to make sure that the blower motor has power and ground and after that check the fuse and the control panel..............