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HVAC Blower Fan and Regulator Replacement
 
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Pelican Technical Article:

HVAC Blower Fan and Regulator Replacement

Jared Fenton

Time:

2 hours2 hrs

Tab:

$150 to $300

Talent:

**

Tools:

T25 Torx driver, 5.5mm or 7/32” socket

Applicable Models:

Porsche 955 Cayenne (2004-10)
Porsche 955 Cayenne GTS (2008-10)
Porsche 955 Cayenne S (2003-10)
Porsche 955 Cayenne Turbo (2003-10)
Porsche 955 Cayenne Turbo S (2006-10)

Parts Required:

New blower fan and regulator

Hot Tip:

Check the fan housing for any debris

Performance Gain:

Climate control fan works again

Complementary Modification:

Recharge AC refrigerant.

One annoying problem that occurs in the Porsche Cayenne is a situation where the climate control fan suddenly starts working intermittently or only at one speed. The problem is usually the blower motor regulator. The regulator controls the fan speed of the blower motor and can fail after many years of use. Thankfully, replacing the blower motor regulator is an easy fix, usually taking no more than an hour.

In this article we will also cover the steps involved with removing the blower fan itself. I recommend removing the fan when you replace the regulator. It allows you to inspect the inside of the housing for debris. Sometimes, dirt and other contaminants can get into the housing and jam up the blower fan. Keep in mind that you will need a 5.5mm or 7/32" socket to remove the fan from the housing.

Replacing the blower regulator and fan requires removing the glove box from the car. Please see our article on glove box catch replacement for more information.

Shown here is the location of the blower fan regulator directly behind the glove box assembly.
Figure 1

Shown here is the location of the blower fan regulator directly behind the glove box assembly. Push the electrical wires out of the way and remove the two 5.5mm screws (green arrows) holding the regulator in the housing.

Press the small plastic tabs on each plug in and remove both plugs (green arrows) from the regulator.
Figure 2

Press the small plastic tabs on each plug in and remove both plugs (green arrows) from the regulator.

Shown here is the new regulator above and the old one below.
Figure 3

Shown here is the new regulator above and the old one below. You'll notice that the locations for the plugs are different. This is due to the regulator being used on different VW products. The regulator itself is the same. When installing the new regulator, simply position the electrical plugs to fit in the new locations. Now simply slide the regulator back into the housing and lightly tighten the screws holding it in place.

At this point, we'll move on to the blower fan itself.
Figure 4

At this point, we'll move on to the blower fan itself. Move underneath the fan assembly and remove the electrical connection going to the blower fan (arrow). Also remove the five 5.5.mm screws holding the blower fan to the housing. Keep in mind that the screws to the right of the fan will be a little difficult to access due to the location of the wiring harness running down the side of the chassis.

Now move back up to the front of the fan housing and remove the last two 5.
Figure 5

Now move back up to the front of the fan housing and remove the last two 5.5.mm screws (green arrows) holding the fan on place. At this point, you can pull the blower fan out from the housing. You may need to move it around a bit to clear the wiring harness. You may also find leaves, dirt or other debris inside the fan housing. Clean up any debris inside.

Shown here is the blower fan removed.
Figure 6

Shown here is the blower fan removed. Take a few moments to hold the housing (yellow arrow) and spin the fan (green arrow). The fan should spin freely and not be binding. If the fan does not spin, it is likely the bearings in the fan are going out and the fan must be replaced.

7: Now move back up to the front of the fan housing and remove the last two 5.
Figure 7

Now move back up to the front of the fan housing and remove the last two 5.5.mm screws (green arrows) holding the fan in place. At this point, you can pull the blower fan out from the housing. You may need to move it around a bit to clear the wiring harness. You may also find leaves, dirt or other debris inside the fan housing. Clean up any debris inside.

Shown here is the blower fan removed.
Figure 8

Shown here is the blower fan removed. Take a few moments to hold the housing (yellow arrow) and spin the fan (green arrow). The fan should spin freely and not be binding. If the fan does not spin, it is likely the bearings in the fan are going out and the fan must be replaced.

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Comments and Suggestions:
Ady W Comments: Superb feed here Pelican/vehicle owners.
I have zero technical knowledge and my 04 Cayenne S has heater problems. Once engine has warmed I can feel a gentle heat, however the air speed does not increase when I request this from the switch.
Do you think this is a blower/regulator issue? I just want to ensure I purchase the correct parts. Many thanks
November 26, 2016
  Followup from the Pelican Staff: Sounds like the blower regulator to me. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need. - Nick at Pelican Parts  
TJ Comments: I have an 03 Cayenne S with a couple issues with the heating/ac system.
1. There's an occasional thump/pumping sound in dash when system is on at lower speed.
2.Heat occasionally works..usually from only the driver seat with a full flow but the rear get minimal flow and nothing but cold air ever from front passenger seat.

Are there regulators and fans for each compartment that need to be replaced?
November 25, 2016
  Followup from the Pelican Staff: No, that sounds more like the blower motor has debris in it or a flap is malfunctioning. - - Nick at Pelican Parts  
TJ Comments: I have a 2003 Cayenne S. I'm having issues with the heating system. I get a thump/pumping sound in the dash when air is running or on lower setting as well as blowing cold air the majority of the time with occasional heat coming from only the front driver side....little to no flow from the rear vents. How would I fix this? Do
November 25, 2016
  Followup from the Pelican Staff: No, that sounds more like the blower motor has debris in it or a flap is malfunctioning. - Nick at Pelican Parts  
CayenneS Comments: Hi, I got an 04 cayenne s. My ac and heater work in all the vents. Except for the ones that blow on your feet. Any idea to what it could be. Thanks
November 19, 2016
  Followup from the Pelican Staff: Sounds like the flap door motor isn't working. Could be something jammed in the heater housing or a fault motor. - Nick at Pelican Parts  
porschefinatic Comments: Is there any way I can find out if I need a blower or a regulator before dismantling?
November 9, 2016
  Followup from the Pelican Staff: You will need to gain access to the blower. You can check if the blower it getting power and ground. If not, the resistor is likely faulty. - Nick at Pelican Parts  
Jacek Comments: Hi , I ve been have ing an issue with my 2005 Cayenne S. The Problem is with the heating cooling fan, the fan itself works but it only blows out cold air. Then when the heat finally kicks, you have to leave the blower/fan on min in the setting. Note: this will sound strange ,but i noticed that the pumped sounds like it doesnt have any fluids antifreeze in it and everything s in order. A.C. turns on fine on command , so I dont think it would be the termo. Please if someone can give me some advice on this it would be more then appreciated! Any suggestions?
October 23, 2016
  Followup from the Pelican Staff: Sounds like poor coolant circulation. Check if hot coolant is getting to the heater core. Should be hot in and warm out. If out is cool, you have poor flow. - Nick at Pelican Parts  
jdubbya Comments: Another project done. This would literally be about a 15 minute job, combined with changing the cabin air filter, if it wasn't for that wire loom right up tight against the two right hand lower bolts. What a pain!! Getting the screws out was only half the battle.

Trying to get the little groove on the front of the blower to line up with the housing going back in was the problem. Without those wires there it would slide right back up in place. Those silly German engineers. Way to make a simple job a pain in my back!!
October 10, 2016
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 
gungui Comments: I have a 2004 cayenne and there is no air coming out of central vents but the corners vents are fine. No air coming below the dash but air is coming over the dash.
September 15, 2016
  Followup from the Pelican Staff: The mode doors may not be functioning properly. I would check the vehicle for fault codes. - Nick at Pelican Parts  
tony Comments: you guys are the best thanks for all your help I had an issue with my front bumper and you gave me detail step by step instructions on how to remove it and now the a/c blower or regulator isn't working If someone were to issue stars like in school you would get the Gold one thanks a million and i will be faithful if i need parts
September 2, 2016
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
toolman Comments: Can I get a price on a replacement blower motor from you?
August 27, 2016
  Followup from the Pelican Staff: Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
toolman Comments: found my heater problem, brushes worn out in blower . Water noise moving around under hood must be another problem Mayby hood seal ?
August 27, 2016
  Followup from the Pelican Staff: Water noise, maybe air in the cooling system - Nick at Pelican Parts  
TOOLMAN Comments: SORRY HAVE A 2004 CAYENNE
August 22, 2016
  Followup from the Pelican Staff: no problem. - Nick at Pelican Parts  
TOOLMAN Comments: HEATER WILL RUN ON LOW BUT WHEN TURNED UP HIGH RUNS FOR A FEW SECONDS AND THEN TURNS OFF. CAN HEAR MOTOR WORKING BUT NOTHING COMING OUT.HAVE REPLACE HEATER REGULATOR BUT NO DIFFERENT. CAN ALSO HEAR WATER MOVING AROUND SOMEWHERE UNDER THE DASH WHEN GOING AROUND CORNERS. IS THE HEATER HOOKED UP TO WATER HOSES. COOLAND SYSTEM NOT USING ANY WATER?
August 22, 2016
  Followup from the Pelican Staff: Motor as in the lower? Possible it is jammed trying to rotate but can't. - Nick at Pelican Parts  
KRL Comments: Just completed this. Went very easy, as described. Thank you very much!
July 20, 2016
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
WG Comments: solved the problem, new fan motor, and found the 40AM fuse that was totally fried
June 24, 2016
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
Scott Comments: I have a 2009 GTS that I just bought. Found out that the passenger side A/C is blowing hot while the driver side is cool. Are there blend door actuators on this vehicle? If so how many and where would the problem one be located? Thanks in advance
June 21, 2016
  Followup from the Pelican Staff: That is more likely a low refrigerant charge. If it is not dual zone climate, there won;t be individual doors. - Nick at Pelican Parts  
WG Comments: put in new regulator, fan blower motor, an still on air is blowing, nor do i hear the fan at all. I checked fuses??
June 17, 2016
  Followup from the Pelican Staff: Check power and ground to the blower when turned ON. What is missing? - Nick at Pelican Parts  
Azaleacity Comments: I have a 2004 cayenne. When you turn on the a/c, sometimes it comes on and sometimes it doesn't, no matter what buttons you push. Help
June 15, 2016
  Followup from the Pelican Staff: Could have a low refrigerant charge. - Nick at Pelican Parts  
WG Comments: 05-02 Comments: replaced the Fan motor regulator, and no success still no fan blowing, checked the fan it moves ok not frozen, could the fuse be out, and where is the fuse panel on the cayenne

found the fuses, checked all fuses seen all ok, still no fan, air or defroster, could it be the fan motor???
May 3, 2016
  Followup from the Pelican Staff: Check power and ground to the blower when turned ON. What is missing? - Nick at Pelican Parts  
WG Comments: replaced the Fan motor regulator, and no success still no fan blowing, checked the fan it moves ok not frozen, could the fuse be out, and where is the fuse panel on the cayenne
May 2, 2016
  Followup from the Pelican Staff: What year Cayenne and model? I may have the info.

if not, you'll need a repair manual, it will have the wiring. - Nick at Pelican Parts
 
Kurtcast Comments: I have a 2003 Cayenne S. Would there be two resisters front and rear? If so where would the rear one be found?
April 12, 2016
  Followup from the Pelican Staff: It is mounted next to the auxiliary blower motor. Behind the interior trim panel in the left rear luggage compartment. - Nick at Pelican Parts  
jim Comments: Hi, great info. regarding part number 955572342-02, blower motor for 08 Cayenne.It was fairly easy getting to the motor as long as you have the mechanical know how n time. I am no pro mechanic but understand certain processes. The housing does need a 5.5 mm, 1/4 socket. Not exactly common, ordered thru NAPA $3-$4. You may want to indicate that the actual blower motor has the bound or fixed fan to the motor itself. It's a nylon fan roughly 6 inches in diameter. The fan cannot be removed separately from motor. The plug assy. needs to be pushed thru the plastic housing from the outside in, in order to free entire unit from black housing which is a VW stamped piece #173.60057 n on the outside in blue lettering is 09/12 1 19 07 348 7L0 820 021 L. This is prob. some internal code that VW recognizes. There was about 3-4 mm of carbon build up on back side of motor as well. It deteriorated slowly w a burning smell coming thru the vents for weeks. Porsche of Orlando wanted $582 for the same thing that Pelican has for $168 plus ship. A genuine Bilstein product also. It should be an easy install along w remembering all of the attachments that go back on the inside of the glove box housing. Good luck. Jim
April 1, 2016
  Followup from the Pelican Staff: Thanks for sharing your installation process and experience. These type of comments add so much to the Pelican tech community.- Nick at Pelican Parts  
Med Comments: excellent instructions, about 2 hours nice and easy does it
February 6, 2016
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
Tackinis Comments: Hello,
My fan was making noise, now stopped completely. Should I pull out and lubricate or change motor?
Only 56k miles on car, 2010 porsche cayenne base.
December 29, 2015
  Followup from the Pelican Staff: If noisy, replace it. When replacing, clean any debris out of the heater housing. - Nick at Pelican Parts  
Ken Comments: I have a 2008 Porsche cayenne base model. When I turn up the heater or ac switch, nothing comes out of the vents. It does not work at all for both the heat and ac. What could the problem be? Thanks in advance for any assistance you can provide.
December 17, 2015
  Followup from the Pelican Staff: The blower motor or resistor could be at fault. - Nick at Pelican Parts  
Senior Airman Saldivar Comments: Great info, I just got my cayenne S fixed and now my a/c does not remains on after turning off my vehicle. I Want to tank the staff from this page for the orientation and having the resistor available.

Thank you guys for saving us money in labor, God bless everyone that contributed to this info and pictures.
November 9, 2015
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
Brett Comments: I have an '05 Cayenne S. I have read all of the comments. I too have black residue on my fan, i pulled it out and it moves freely. However, most of the time neither the A/C that heater turns on...however, every now and then it does. tyically, the A/C turns on when it is cooler outside, but not on hot days coincidence?...seems like I have symptoms of both the regulator and blower motor...do you suggest I just switch both out or is there one I should do before the other to see if it resolves the problem? - thanks.
October 24, 2015
  Followup from the Pelican Staff: Regulators are more common, but replacing both isn't a bad idea. - Nick at Pelican Parts  
Norris Comments: I have a 2008 Cayenne S. The blower was running intermittantly and making lots of noise. I got 3 quotes to replace the blower and the resistor that ranged from $600 to $920. After reading this page and ordering parts, I did it myself in 65 minutes. These instructions and guidance were fantastic! Everything was spot on so it was really straight forward.

The only thing I found different from the instructions were that the bolts holding the glovebox in were T20 Torx and not T25.

Thanks a bunch!
September 11, 2015
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
joeyg39 Comments: When I spin the blower fan, should the fan continue to spin freely after I spin it? Because it stops immediately once I take my finger off of it.Trying to determine if I need a new blower fan. I'm still waiting for fan regulator to arrive. Thanks.
August 19, 2015
  Followup from the Pelican Staff: Yes, it should move without major resistance. - Nick at Pelican Parts  
JimmyEsp Comments: My problem is that there are no air only in the side vents. No air at all in the central or lower vents. How can i solve it?
Thanks in advance!
August 18, 2015
  Followup from the Pelican Staff: What kind of vehicle are you working on? What are your hvac settings? - Nick at Pelican Parts  
boxster john Comments: I just removed my fan yhat was not frozen up yet, and found lots of black powder stuff all over everything.
I believe it to be carbon from the cabin filter. I think it gets into the bushings and kills them.Buy a new Porsche,get rid of the charcoal filter.
August 11, 2015
  Followup from the Pelican Staff: The black is probably from the faulty blower motor, not the filter. - Nick at Pelican Parts  
antonio Comments: my 2008 cayenne ac works, the air does not stay consistent sometimes stays on after turning off the engine and removing the key, this drains my battery eventually
July 24, 2015
  Followup from the Pelican Staff: Sounds like a faulty blower regulator. - Nick at Pelican Parts  
jhaley007 Comments: I replaced the Blower Fan and Regulator as per the instructions. This fixed the problem. Works perfectly. Thank you Pelican Parts. I'm not sure if it was only the Regulator as I replaced both components.
June 4, 2015
  Followup from the Pelican Staff: Very good! Thanks for the feedback. Glad we could assist you. - Casey at Pelican Parts  
rj Comments: same exact problem as jhaley007 above. Does this mean I need to only replace the regulator as when it does come back on it the fan seems to work fine.
May 27, 2015
  Followup from the Pelican Staff: It does sound like the blower motor final stage is your problem. - Nick at Pelican Parts  
jhaley007 Comments: I'm reading your article HVAC Blower Fan and Regulator Replacement, and was wondering if this is related to my problem. When the cabin is hot and the air conditioner kicks on, the Blower Fan runs at 100% for about 1 minute, then cuts out. You then hear a hum coming from under the dash. The AC will continue to run, as you can feel cool air coming out of the vents, but after 20 seconds it with then cut out completely then seconds later turn back on. The blower will never come back on unless you turn off the AC completely and wait a few minutes.
May 26, 2015
  Followup from the Pelican Staff: It does sound like the blower motor final stage is your problem. - Nick at Pelican Parts  
Jags Comments: Hi

Please have you got instructions on installing an electric defrost flap in a 2003 955 cayenne S its a right hand drive I believe the part is 95562491101 electric defroster flap for right hand vehicle only.

Many Thanks
September 8, 2014
  Followup from the Pelican Staff: We don't currently have that tech article.

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
 

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