Audi Parts Catalog Audi Accessories Catalog Audi Technical Articles VW-Audi Tech Forums
 
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Removing Audi A4 Blower Motor and Resistor
 
Bookmark and Share

Pelican Technical Article:

Removing Audi A4 Blower Motor and Resistor

Steve Vernon

Time:

2 hours2 hrs

Tab:

$250

Talent:

**

Tools:

Trim removal tools, 10mm, 8mm, 6mm socket

Applicable Models:

Audi A4 (2002-05)
Audi A4 Cabriolet (2003-06)

Parts Required:

New blower motor and resistor

Hot Tip:

Be careful not to pinch wires when reinstalling

Performance Gain:

Working HVAC

Complementary Modification:

Clean the ducts

The Audi A4 is a very comfortable and capable all season car. The HVAC system keeps both the front and rear passengers comfortably cool in the summer and warm in the winter. Over time some of the components in the HVAC system will start to wear out and require repair or replacement. This is especially true if you live in a harsh four season environment and run the system more than a vehicle that lives in a more temperate location. If you find that the heating or cooling system in the car is starting to act up, like diminished volume of air moving through it or a squealing sound coming when you try and run the fan, there is a good chance your blower motor or resistor is starting to go bad. The blower motor works in conjunction with the resistor pack to move air through the HVAC system. If your blower motor will not run at top speed the most likely culprit is a bad resistor pack. The resistor works in conjunction with the motor and system to control the speed and therefore volume of air moving through the system. Failure of the motor to run at top speed while running smoothly and quietly at lower speeds is almost always the resistor pack. Unfortunately, on the Audi A4 the resistor is built into the blower motor and cannot be replaced separately.

If the blower motor starts making noise when you turn the fan on, there is a very good chance it is starting to go bad and will need to be replaced. While it is possible to lubricate the blower motor's shafts around the hamster wheel this is usually only a temporary fix and you have to catch it right away. Once it starts squealing there is metal on metal contact and damage being done to the motor.

The blower motor is located behind the glove box above the passenger side foot well. You will need to remove the glove box to replace it. The information for removing the glove box is included in this article so you can complete this job start to finish right here.

The glove box is removed as a complete unit (red arrow).
Figure 1

The glove box is removed as a complete unit (red arrow). You will need to remove the dash side cover to remove the glove box (yellow arrow).

Use a trim removal tool and gently pry the cover away from the dash (red arrow).
Figure 2

Use a trim removal tool and gently pry the cover away from the dash (red arrow).

Open the glove box and remove the three 8mm screws along the upper ledge of the glove box (red arrows).
Figure 3

Open the glove box and remove the three 8mm screws along the upper ledge of the glove box (red arrows).

Remove the two 8mm screws on the lower section of the glove box (red arrows).
Figure 4

Remove the two 8mm screws on the lower section of the glove box (red arrows).

Next, use the 8mm socket and remove the single screw on the side (red arrow).
Figure 5

Next, use the 8mm socket and remove the single screw on the side (red arrow).

With the glove box open remove the four 8mm screws inside the glove box (red arrows).
Figure 6

With the glove box open remove the four 8mm screws inside the glove box (red arrows).

The glove box will now lower as a complete unit from the dash (red arrow).
Figure 7

The glove box will now lower as a complete unit from the dash (red arrow).

While there are several lights and a sensor connected to the glove box unit, you only need to disconnect the main wiring connection from the harness.
Figure 8

While there are several lights and a sensor connected to the glove box unit, you only need to disconnect the main wiring connection from the harness. Squeeze in the tabs and pull the connections straight apart (red arrow).

With the glove box removed you can see the blower motor in the housing (red arrow).
Figure 9

With the glove box removed you can see the blower motor in the housing (red arrow).

Separate the wiring connection on the bottom of the motor (red arrow) and unclip the harness from the front of the housing (yellow arrow).
Figure 10

Separate the wiring connection on the bottom of the motor (red arrow) and unclip the harness from the front of the housing (yellow arrow).

Use a 10mm socket or wrench and remove the two bolts on the HVAC mounting bracket (red arrows).
Figure 11

Use a 10mm socket or wrench and remove the two bolts on the HVAC mounting bracket (red arrows). You are going to need to pull the unit slightly towards the rear of the car to remove the motor.

Remove the lower sill trim plate (red arrow) so you can fold the carpet back and get access to the 6mm screws holding the blower motor to the housing.
Figure 12

Remove the lower sill trim plate (red arrow) so you can fold the carpet back and get access to the 6mm screws holding the blower motor to the housing.

The sill trim piece is just a series of metal clips (red arrow); use your trim removal tool and gently pry it up and out.
Figure 13

The sill trim piece is just a series of metal clips (red arrow); use your trim removal tool and gently pry it up and out.

Use a 6mm socket and remove the three screws holding the motor to the housing (red arrow, one shown).
Figure 14

Use a 6mm socket and remove the three screws holding the motor to the housing (red arrow, one shown). The rear screw is very difficult to remove and requires slightly pulling the unit forward and pulling the carpet and sound pad out of the way.

With the screws removed you can lower and remove the motor and fan from the housing (red arrow).
Figure 15

With the screws removed you can lower and remove the motor and fan from the housing (red arrow). You will need to turn the motor slightly as you remove it.

Use an 8mm socket and remove the three bolts holding the cover plate on (red arrows).
Figure 16

Use an 8mm socket and remove the three bolts holding the cover plate on (red arrows).

With the cover plate off you can see how the resistor is built into the blower motor (red arrow).
Figure 17

With the cover plate off you can see how the resistor is built into the blower motor (red arrow). You have to replace the motor and resistor as a unit. Installation is the reverse of removal.

Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Sat 12/3/2016 02:45:55 AM