2013 Passat Driver's Side Heat blend door servo replacement

ReallyBigAir

Member
Joined
Dec 24, 2019
Location
The Queen City
TDI
2013 Passat TDI SEL Premium
Hello All,

We have a newly purchased 2013 VW Passat TDI SEL Premium with a heating/cooling system issue. It has duel zone heating/cooling and everything seems to work just fine on the passenger side. However, on the drivers side, it always blows hot air, even when the controls are set to A/C and the temp is set at LO or 64 degrees.

My son and I took off the required interior panels and found the drivers side blend door actuator servo module. We changed the temperature setting and the servo actuator did not move. We ended up removing the servo module, tested the motor (it works), cleaned up much of the gobs of grease and reassembled everything. We tested it before re-installing all of the panels. When we changed temperature from LO to HI and back, the actuator moved and we got the correct air mixture. Success! Or so we thought......

After putting everything back together, it worked for one trip around the block. Next time we drove the car, it was back to HOT all the time, regardless of temperature setting.

Couple of questions:

Do you think we need to use VCDS to reset the servo? Any chance this will "fix" the problem? We do not have a VCDS unit, so we'll have to borrow one.

Next, the servo module has 3 screws and one pin that hold it in place. During the removal of the module, we broke off the one tab that holds the screw at the "back" of the servo module. This tab is not visible when you are in the drivers side floor looking at the servo module. There is no access to that screw. We ended up using Gorilla super glue to glue the broken tab to the servo module. So, if I end up replacing the driver's side blend door servo module, do you know how to remove the in-accessible screw on the back end (towards front of car) of the servo module? There is no access hole and there is a metal structural member in the way. Is there a special tool that will fit between the metal structural member and the top (cover) of the blend door servo? Actually, removing the screw, once we take out the old module, will not be a problem. However, putting the screw back in, after replacement with a new module, will be a problem.

Anyone have a service manual that explains how to replace the drivers side blend door servo module on a 2012 Passat?

Thanks for any assistance or advice.
 

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis (where it's safe)
TDI
There are just too many to list....
Step one: remove instrument panel

Step two: replace ALL the Chinese HVAC motors (three or four, depending on equipment)







I have done a BUNCH of these.
 
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oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis (where it's safe)
TDI
There are just too many to list....
Nothing but Chinacool replacements, unfortunately. I wish I had better news. The new ones look the same as the bad ones I take out. This is something unique to the NMS Passat, as no other VAG product I am aware of uses the same HVAC, although I suspect the Atlas shares a lot with them.

It isn't just Volkswagens assembled in North America either. Lots and lots of GM and Ford vehicles are cursed with Chinese HVAC motors. In some cases they are easy to swap, in others, you have to take the dash half apart or out of the car altogether.
 
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jpg98

Member
Joined
Oct 9, 2015
Location
central IL
TDI
2014 TDI SEL Premium
RallyBigAir,

Did you get it fixed? I need to replace the blend door actuator on the passenger side of my 2014 because someone removed it and tied it to full heat. I'm curious whether you needed vcds for the job.
 

ReallyBigAir

Member
Joined
Dec 24, 2019
Location
The Queen City
TDI
2013 Passat TDI SEL Premium
@jpg98 - I have not yet replaced the blend door actuator. Hoping to borrow my cousin's vcds and try a reset first. If the reset does not resolve the issue (not likely), I'll replace the part. I do not know if vcds (reset) is required post replacement.
 

VernK

Veteran Member
Joined
Jul 31, 2012
Location
Kelowna
TDI
2012 Passat 2.5L Gas
Looks like I've had the driver side blend motor fail again, though I have not checked with vcds yet to confirm. The last time I had the dealer change it out. This time I'm wondering just how much of the dash I need to take apart to replace it myself? As I recall, cost me about 300$ the last time for the dealer, which sounds like a 2 hour job or so.

Yours
Vern
 

VernK

Veteran Member
Joined
Jul 31, 2012
Location
Kelowna
TDI
2012 Passat 2.5L Gas
So the blend motor seems to have fixed itself, for now at least. So for now I'll let it alone.

The dealer says it's a 1.5 hour job to swap one, BTW.

Yours
Vern
 

Dretaylor94

New member
Joined
May 9, 2020
Location
North Carolina
TDI
2014 Passat TDI SEL Premium
Hey. Just wanted to share some potentially helpful information to anyone who may have issue in the future.
About 2 months ago I began having that same problem where my driver side vents was blowing out extremely hot air no matter what the climate control temp was set to. All other vents in car worked fine. At first it would happen randomly, where somedays it managed to correct itself and work fine. Until about a month ago, it completely stopped working and I was getting nothing but hot air from driver side all the time. After doing a lot of researching, I discovered that you can reset the blend door motor without the VCDS by simply holding down the middle vent and AC button at the same time (attached image shows which two buttons I’m referring to) for a couple seconds while the vehicle is started. Once you release the buttons, the orange light will begin flashing on those two buttons for about 10-15 seconds while the reset takes place. Once they stop flashing, you should be good to go. I performed this reset a little less than a month ago and all my vents have been working perfectly fine ever since. Hope this info is helpful to someone.
 
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VernK

Veteran Member
Joined
Jul 31, 2012
Location
Kelowna
TDI
2012 Passat 2.5L Gas
Very interesting. Where did you find that info? I'm wondering what other resets the cars may have.

Yours
Vern
 

Dretaylor94

New member
Joined
May 9, 2020
Location
North Carolina
TDI
2014 Passat TDI SEL Premium
I came across it in a YouTube video after googling info on blend door actuators. Didn’t come across any other resets while searching. Was mainly focusing on trying to figure out the vent issue.
 

jjblbi

Veteran Member
Joined
Sep 27, 2000
Location
lbi, nj
TDI
2014 Passat SEL TDI
I am having the same: issue weak a/c on the driver's side. I thought my system needed a charge but when I hooked up VCDS today I had 4C (40F) at the evap and 9-12C at the passenger side foot well and dash vents. Driver's side was 27C & 29C respectively.

I'll try the two button push reset tomorrow and thanks for the info. John
 

jjblbi

Veteran Member
Joined
Sep 27, 2000
Location
lbi, nj
TDI
2014 Passat SEL TDI
Well I did the to two button reset and it did seem to help although not fully correct the problem. Will try it again and use a thermometer to check actual vent output.

Thanks for the tip, John
 

jjblbi

Veteran Member
Joined
Sep 27, 2000
Location
lbi, nj
TDI
2014 Passat SEL TDI
I threw the gauges on the a/c system and the charge was low. One can of refrigerant and now I am ice cold. Did the two button reset a couple more times to exercise the blend doors. Definitely working better once the actuators fully stroked a couple of times. At the risk of jinxing myself, ready for summer. John
 

robertgalka

Veteran Member
Joined
Sep 13, 2004
Location
Winnipeg Canada
TDI
2015 Passat Highline
I am having the same: issue weak a/c on the driver's side. I thought my system needed a charge but when I hooked up VCDS today I had 4C (40F) at the evap and 9-12C at the passenger side foot well and dash vents. Driver's side was 27C & 29C respectively.

I'll try the two button push reset tomorrow and thanks for the info. John
Is it still working after a year? I am having the same problem, and my temps are the same. My actuators seem to be working fine. I'm not getting any error codes with my VCDS either.

I did change my heater core about 18 months ago, but I had AC after that.
 

jjblbi

Veteran Member
Joined
Sep 27, 2000
Location
lbi, nj
TDI
2014 Passat SEL TDI
Monday driving home from work in Phila to coastal NJ I saw 100F outside temp. and the sun was blaring. The a/c was struggling a bit but car was cool and comfortable cruising along at 75 mph. Average 41+ mpg for the commute, 213k miles on the car.
 

yoda254

Member
Joined
Mar 17, 2014
Location
tx
TDI
2012 jetta tdi sedan
How hard is it to replace the v426 servo motor? My 2014 passat tdi sel stopped blowing cool air in the middle vents a few months back. I took it to vw hoping to was just another heater core. They said the v426 front air distribution door is jammed and all distribution air flaps are stuck facing half way. The motor needs to be replaced and the dash has to com out to get to it. They want to charge me $900 to fix it.
 
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