Jeep Repair: heat, air doors, one at home

Question
i have duel heat in my jeep it is a 2000 grand chee limited my heat works fine on the drivers side but notpassanger side blows out cold air someone said it could be the blend door but it is working on the one side is there 2 different blend doors ?

Answer
it is the blend air doors  the doors are a set of 2 doors one for driver and one for passenger  they are together but use different motors for each side. The dash will need to come out and box split apart to replace them. I did a set at work today and I am doing one at home on sunday.