NO HEAT
 

my sons 05 Grand Cherokee will not put out any heat in the cabin. I think the blend doors are stuck. The shop says it will const about 500 dollars to fix as they have to tear the dash apart. Does anyone know any thing about the heating system? Could it just be a theremostat? I would think a shop would know.

GRAND WHAT? no its not the thermistat, it probly is your door or an accuator. and yes to change them the dash mush come out. if its the doos u will more then likely need a new housing