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HVAC Blower Motor and Regulator Replacement
 
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Pelican Technical Article:

HVAC Blower Motor and Regulator Replacement

Jared Fenton

Time:

2 hours2 hrs

Tab:

$150

Talent:

***

Tools:

T25 Torx driver, Phillips head screwdriver

Applicable Models:

A6 2.7T (1997-04)
A6 2.8 (1997-02)
A6 3.0L (2002-04)
S6 4.2 (1997-04)

Parts Required:

Blower Motor, Blower Motor Regulator

Hot Tip:

Be sure to clean and inspect the inside of the fan housing

Performance Gain:

Working HVAC system

Complementary Modification:

Replace glovebox light bulbs.

Over time, it is not uncommon for the blower motor and regulator to wear out, leaving you with a non-functional HVAC system. In this article, I'll go over the steps involved with replacing the fan motor and regulator yourself.

Keep in mind that replacing the motor and regulator requires you to remove the glovebox beforehand. I also recommend disconnecting the battery before removing both items. See our articles on Battery Replacement and Glovebox Removal for more information.

Removing the HVAC blower motor is pretty easy and should not take more than an hour once the glovebox is removed.
Figure 1

Removing the HVAC blower motor is pretty easy and should not take more than an hour once the glovebox is removed. In this picture, you can see the three T25 Torx screws (green arrows) that secure the motor in the fan housing. Loosen and remove the three screws to remove the fan. Also take mote of the blower motor regulator directly to the left of the fan (purple arrow).

Once the mounting screws are removed, pull the fan motor out of the housing and inspect the inside of the fan housing for dirt and debris.
Figure 2

Once the mounting screws are removed, pull the fan motor out of the housing and inspect the inside of the fan housing for dirt and debris. Clean out the housing if needed.

Locate the zip tie (green arrow) holding the electrical harness to the fan motor housing and cut it off.
Figure 3

Locate the zip tie (green arrow) holding the electrical harness to the fan motor housing and cut it off. You'll want to use a new zip tire to secure the harness to the new motor.

Use a small screwdriver to press the tab on the electrical connector (green arrow) and pull off the connector.
Figure 4

Use a small screwdriver to press the tab on the electrical connector (green arrow) and pull off the connector. Installing the new fan motor is the reverse order of removal.

The fan motor regulator is also easy to replace.
Figure 5

The fan motor regulator is also easy to replace. Squeeze the two tabs on the electrical connector (green arrows) and pull it off the regulator.

Now loosen and remove the Phillips head screw (green arrow) securing the regulator to the fan housing and carefully pull the old regulator out of the housing.
Figure 6

Now loosen and remove the Phillips head screw (green arrow) securing the regulator to the fan housing and carefully pull the old regulator out of the housing.

Shown here is the blower motor regulator removed from the fan housing.
Figure 7

Shown here is the blower motor regulator removed from the fan housing. Installing the new regulator is the reverse order of removal.

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Page last updated: Wed 12/7/2016 03:08:49 AM