2008 Lucerne does anyone know where the mode actuator door is located i only have air blowing out the dash vents going to need defrost pretty soon

[JS 08 Lucerne]

2008 Lucerne only have air blowing from dash vent where is the mode door actuator located going to need the defroster pretty soon

 

[2007LucerneCXL]

Here is a diagram and a site that will help on location of the actuators.

https://buick.catalogs-parts.com/#{client:1;page😛art;lang:en;family:lucerne;model:49037-2008;group:0-0-1608642820;subgroup:0-1624083966-0-0}

 

[Acroyer]

Nice. I stumbled across this because of my own '08 Lucerne.

I'm guessing I have to replace part #5, since I now have air weakly coming out of basically everywhere. Is this something where the dash has to come off, though?

 

[2007LucerneCXL]

Unfortunately the HVAC unit is difficult to work on most parts and I can't recall if this is available with the dashboard removed. I had mine off for the sat antenna but didn't examine the area on other components at the time.

 

[Acroyer]

Thanks.

I'll see if I can find something about it. Almost everywhere I look for Lucerne HVAC stuff, they are talking about the electronic dual-zone option. I have the old-fashioned dials the affect everyone.

 

[2007LucerneCXL]

Additional diagrams, but between the dual zone and basic very little difference between the two on the overall system design.


There's older posts where a owner had most of the dashboard removed, forgot if it was heater or AC, but may be worth a search.

 

[WalmartTech21]

Nice. I stumbled across this because of my own '08 Lucerne.

I'm guessing I have to replace part #5, since I now have air weakly coming out of basically everywhere. Is this something where the dash has to come off, though?

#5 is actually for the Recirculation door; you actually need to replace #14.

 

[2007LucerneCXL]

This may help

 

[2008LucerneCX]

Good luck. I couldn't get to my actuator but discovered if you pull the connection from it the system defaults to defrost....and that's where it's stayed. Feet a lil cold in the very very cold weather but not bad. A/C blows strong through those side defrost vents enough to keep you cool.

 

[BigEd87]

I have the exact same problem, on my 2008 Lucerne. But I can't get the glove box out to even see this actuator. How did you get to yours?

 

[Roger17581]

Good luck. I couldn't get to my actuator but discovered if you pull the connection from it the system defaults to defrost....and that's where it's stayed. Feet a lil cold in the very very cold weather but not bad. A/C blows strong through those side defrost vents enough to keep you cool.

Which actuator plug did you pull?

 

[BigEd87]

I pulled the temperature control and the recirculation I believe. One was on the far right side and the other was in the middle but way back. I'm wondering if there is a something else that could be wrong because I had thought when those are unplugged it should go to defrost and it didn't.

 

[Albertlong92]

Boy, I got the mode actuator out of mine but it took forever and freekin sucked ass. Then of course the one I ordered was the one opposite of the mode actuator so I just screw it and left it on defrost. I’ll probably never attempt it again tbh lol

 

[Albertlong92]

I have the exact same problem, on my 2008 Lucerne. But I can't get the glove box out to even see this actuator. How did you get to yours?

It sucks