i have a 2010 jeep liberty sport ,last winter we have a big problem,no hot air in the floor,but defrost and front are perfect, this weekend i try to check (and fix) this problem i remove the cover under the steering wheel and i remove the blend door actuator (up) this jeep have two,one on the botton is for heat/cold and the second (up) is for the defrost,front,botton i remove this one (up) and y try to move the blen doors whit my fingers and i have hot air just defrost and front but just a little bit on the floor almost nothing,we try with anoter blend door actuator(from another 2010 jeep) and nothing no hot air on the floor,i feel the blend doors (up) are broken because they are very loosy,i ask to a chrysler mechanic and he told me this are dual blend doors and i need to remplace the housing distribuitor (dual blend doors) and i need to remove the dash