no defrost or floor heat

[Motofreak]

have an 04. 5 Laramie heater selector knob turns fine but only blows from front. cant get it to defrost or floor heat. i can feel it click but nothing changes. defrost comes in very handy.

any hints? dont want to take it to shop.

 

[sabersix]

You most likely have a broken blend door. Very common problem. Requires removal of the dash for replacement. Not an easy or inexpensive job, but as you said, "defrost comes in very handy. "



Do a search on "blend door"

 

[scootergmc]

You don't want to take it in? Here you go:



https://www.turbodieselregister.com...discussions/166129-hvac-removal-pictures.html



Have a blast.

 

[Motofreak]

crap, didnt think it was going to entail all that. thanks for the link (i think)

maybe i will take it in, looks like an engine overhaul would be easier.

appreciate the help.

 

[seafish]

Motofreak, it may just be the control head that controls all the blend doors. Check out post #3 here--https://www.turbodieselregister.com/forums/3rd-generation-ram-forum-no-engine-transmission-discussions/207665-cab-hvac-temp-problem.html

 

[JDeMont]

That's Why I don't Move the Knob in the Winter

Dunno if it will help long run, but after reading all the Blend-Door problems, I leave mine on the next to the last position (defrost w/ a bit of foot heat) all winter and then move it to the A/C - Fresh Air position for the summer.



My hillbilly logic is (1) Only move the door 2 times per year and (2) Only move the door when the temperature is warm (either ambient or w/ heater on).



As far as I can tell, the door movement mechanism does not operate when the key is turned off and on; i. e. , it only moves when the knob is rotated to a new position.



I know this doesn't help if it's already broken, but according to this forum, the replacement door is the same POS.



FWIW,



Jim DeMont

Medford, OR



2004. 5 White Dually Six Speed

 

[Coalsmoke]

Does anyone know in what year did the updated blend doors make it into production trucks and are no longer an issue?

Thanks

 

[bcdiesel]

I follow the same hillbilly logic too, still on my original for now...

Dunno if it will help long run, but after reading all the Blend-Door problems, I leave mine on the next to the last position (defrost w/ a bit of foot heat) all winter and then move it to the A/C - Fresh Air position for the summer.



My hillbilly logic is (1) Only move the door 2 times per year and (2) Only move the door when the temperature is warm (either ambient or w/ heater on).



As far as I can tell, the door movement mechanism does not operate when the key is turned off and on; i. e. , it only moves when the knob is rotated to a new position.



I know this doesn't help if it's already broken, but according to this forum, the replacement door is the same POS.



FWIW,



Jim DeMont

Medford, OR



2004. 5 White Dually Six Speed