Parts Catalog Accessories Catalog Tech Info Tech Forums
 
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Porsche 911 Carrera HVAC Motor Replacement
 
Bookmark and Share

Pelican Technical Article:

Porsche 911 Carrera HVAC Motor Replacement

Time:

1 hours1 hrs

Tab:

$320

Talent:

**

Tools:

6mm socket with ratchet, screwdriver

Applicable Models:

 
Porsche 996 Carrera models (1999-05)
Porsche 996 Turbo, GT2, GT3 (2001-05)
Porsche 997 Carrera models (2005-08)
Porsche 997 Turbo, GT2, GT3 (2007-08)

Parts Required:

New blower fan assembly

Hot Tip:

Take your time removing the plastic air duct

Performance Gain:

Working heater and A/C

Complementary Modification:

Clean out inside of blower housing if needed

Over time, the blower fan that provides both heating and air conditioning air to the inside of the car can wear out and eventually fail. The good news is that this is an easily replaced part. Sometimes you'll get some signs that the fan is failing, usually a high pitched squeal when the fan spins, indicating a worn fan bearing. Sometimes the fan just won't spin at all.

To replace the fan, begin by disconnecting the negative terminal on the battery. This is the most important part of the job. You don't want to risk accidentally turning the fan on while removing it.

Now climb into the passenger side footwell. Up under the dash, you'll see a foam liner held in place by two plastic retaining screws. Remove these two screws and pull the foam liner out (See picture 2). Underneath you'll see a plastic access cover held in by two 6mm screws (See picture 3). Remove the two screws and take the panel off. This panel holds the fan in place in the blower housing.

Next you'll have to remove the plastic duct in front of the fan housing that provides air to the passenger side vent. This is probably the trickiest part of the job as it will seem that there isn't enough space to remove it. If you look up under the dash, you'll see that the duct connects to the center blower vents on the left and to the passenger side vents on the right. I found it easier to pull one side of the duct off the vents, and then carefully maneuver it out of the way to pull the other end off. The plastic bellows in the center of the vent allows quite a bit of flex, so don't be afraid of damaging the vent (See pictures 4 and 5).

Once the duct has been removed, the fan assembly should just drop down out of the fan housing. You'll notice that there is a small hook on the outside of the fan that holds the wiring harness that leads to the fan. Lift the fan up into the housing to allow enough slack in the housing to slide the harness over the hook (see picture 6). This will allow you to lower the fan down enough to unplug the harness from the fan. To release the wiring harness connector from the fan, simply push the two tabs on the plug connector together and pull it off. (see pictures 7 and 8).

Now it's a simple matter of taking the new fan, plugging the wiring harness connector in, and sliding the new fan up into place. You'll see that there is a groove in the fan housing that the fan slides into. Once the fan is located up in place, slide the wiring harness up and over the retaining hook, then refit the access cover on the bottom of the fan and housing.

Now re-fit the air duct between the center and passenger side vents. As before, this can be a bit tricky. You'll want to make sure that both ends of the duct slide into place on each end. This will probably take a bit of work, but can be done, just take your time. After the duct is in place, fit the foam cover piece back into place.

The HVAC fan on the Carrera is one of those items that tend to fail as the cars reach over 10 years old.
Figure 1

The HVAC fan on the Carrera is one of those items that tend to fail as the cars reach over 10 years old. The good news is that replacement is very easy and can be done in about a half hour. As always, Pelican Parts can provide you with a new fan to make the job easy for the DIY'er.

Begin by disconnecting the battery and looking under the passenger side dash.
Figure 2

Begin by disconnecting the battery and looking under the passenger side dash. You'll see a foam plastic cover held on with two plastic retaining screws. Remove the two screws and pull the foam cover from underneath.

With the foam cover removed, you'll see the two 6mm screws holding the bottom cover of the fan housing on (green arrows).
Figure 3

With the foam cover removed, you'll see the two 6mm screws holding the bottom cover of the fan housing on (green arrows). Remove the two screws and set the bottom cover aside.

This is what you should see with the fan cover removed.
Figure 4

This is what you should see with the fan cover removed. You can just see the blades of the fan up inside. Take note of the air duct directly in front of the fan housing (green arrow). You'll need to remove this to have room to lower the fan out.

At first, it may seem as though you have no room to remove the duct from in front of the fan housing, but the bellows molded into the center of the duct allows you enough flexibility to remove it from one side, and then carefully maneuver it out.
Figure 5

At first, it may seem as though you have no room to remove the duct from in front of the fan housing, but the bellows molded into the center of the duct allows you enough flexibility to remove it from one side, and then carefully maneuver it out. Take your time and it should come out with no problem.

With the duct and the lower cover removed, the fan should just drop out of the housing, only held in place by the wiring harness shown here (green arrow).
Figure 6

With the duct and the lower cover removed, the fan should just drop out of the housing, only held in place by the wiring harness shown here (green arrow). Push the fan back up inside the housing enough to slide the harness over the hook. The fan assembly should now drop completely out of the housing.

After you slip the harness out of the hook on the side of the fan, lower the fan down and squeeze the two tabs on the harness connector to release it from the fan (green arrow).
Figure 7

After you slip the harness out of the hook on the side of the fan, lower the fan down and squeeze the two tabs on the harness connector to release it from the fan (green arrow).

Shown here is a clearer shot of the wiring harness connector that plugs into the back of the fan (green arrow).
Figure 8

Shown here is a clearer shot of the wiring harness connector that plugs into the back of the fan (green arrow). It's a bit difficult to get aPicture of this connector when installed on the fan. Here you can see the two tabs on the top of the plug. Just squeeze them towards each other and pull the plug off.

Bookmark and Share
Comments and Suggestions:
Steve_TT Comments: 2007 911 Turbo - I have 12V and 2.5A at the 2 wire plug to the blower when the ignition is turned on irrespective of whether the display shows fan speed on or off. Since there is power to the blower and it is not spinning, is it certain that the blower is toast? How does the AC series resistor fit into the equation? I'm hoping to confirm it's the blower before ordering. Thanks
June 19, 2015
  Followup from the Pelican Staff: Most likely the blower is faulty. Your car should have an output final stage fan control in lieu of a resistor. This will vary the voltage to the blower motor. I would say that if you have 12V at the fan connector it is safe to say the blower is faulty. What you can do just as a follow up to your already awesome diagnostic is to use a jumper pack and a few jumper wires to carefully power the fan. If you add 12V and the fan doesn't run the blower is definitely faulty. - Casey at Pelican Parts  
porschewannabe Comments: Any follow-up on the glove box?

Any issues with that?

Need to consider that replacement soon.

Can feel the cold air but not the hot. If heat is applied you can measure the ducts heating up but no air into the cab.

The cab gets cold but again it seems no air pressure - blower must be out.
April 22, 2015
  Followup from the Pelican Staff: Not yet. We would need a vehicle to create the additional content with. None yet.

I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
DOESNTGTNEBETER Comments: IF YOU HAVE A GLOVE BOX IT IS SLIGHTLY DIFFERENT PROCESS YOU HAVE TO REMOVE YOUR GLOVE BOX.
April 8, 2015
  Followup from the Pelican Staff: Yes in this article there was no glove box. I will see if we can add that piece of information. - Casey at Pelican Parts  

  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: Wed 12/7/2016 02:31:53 AM