Hey Guys

Anyone ever encountered this one? Trying to heat the cabin in frigid weather over here. With the heat on full and the engine at operating temp, I have warm air coming our the passenger-side vents, but COLD air coming out the driver side vents...

Any ideas or thoughts? Thanks in advance for any help!

 

Possible blend door issue

 

Get you truck at full operating temp. Then open hood and feel the in and out heater core hoses on the passenger side of truck fire wall make sure they are about the same temp and hot. If they are both the same temp and hot you might have a broken blend door or the fresh air intake door is broken.
Remove the blower motor simple remove the 3-4 screws and connector and pull out be careful not to damage the cage blower. You might be able to look up in side with a light or put your hand inside to feel if door is broken.
Also does all the direction of air flow work floor, vent,defrost work when you dial in those. if they all work then those doors should be ok. and maybe the fresh air intake might be broken as I said letting in cold air.

Other possibilities could be thermostat, Low coolant, Air bound, clogged radiator or clogged heater core. Gotta check all I mentioned.

Then go here and read also https://heatertreater.net/2008-dodge-ram/

Good Luck

 

Thanks out to all you guys for the follow up! Gonna be a busy Sunday. Cheers