HELP: 2026 Bighorn - Defrosters barely working

[Granite Goat]

I'm a couple hundred miles into my 2nd road trip in my brand new truck (bought 2 weeks ago). It is 25° outside, light snow, on the freeway, and the top half of the windshield is freezing up on the outside. Defrosters set to full fan speed, 78°, getting hot as hell in the cab, but barely able to keep up. Feels lile most air is coming out by my feet. Very little coming out by the windshield. I've tried toggling between split and full defrost to no effect. Graaah!

 

[Granite Goat]

I'm a couple hundred miles into my 2nd road trip in my brand new truck (bought 2 weeks ago). It is 25° outside, light snow, on the freeway, and the top half of the windshield is freezing up on the outside. Defrosters set to full fan speed, 78°, getting hot as hell in the cab, but barely able to keep up. Feels lile most air is coming out by my feet. Very little coming out by the windshield. I've tried toggling between split and full defrost to no effect. Graaah!

If it were any colder, I would be in a lot of trouble!

 

[KrustyKush]

Dang. Sounds like something in the HVAC vent’s isn’t right. Hoping for warmer weather for you ‘til you can get it into a shop.

 

[jkm312]

Manually move the heating system thru all of the mode settings. Floor only, floor and upper vents, defroster mode etc. It might force the blend door linkage to put the blend door where it belongs relative to the dash control settings. Sometimes the linkage in my RAM binds up it not moved thru the full range.
Hope it helps.

 

[Granite Goat]

Manually move the heating system thru all of the mode settings. Floor only, floor and upper vents, defroster mode etc. It might force the blend door linkage to put the blend door where it belongs relative to the dash control settings. Sometimes the linkage in my RAM binds up it not moved thru the full range.
Hope it helps.

Yeah, I tried cycling through the modes to no avail. Luckily it is above freezing now. I picked up a couple gallons of ice-melter washer fluid to get me by for the balance of my trip.

 

[jkm312]

As a last resort for the time being, consider pulling the cabin filter out to make it as unrestricted as possible.
Regardless stay safe.