2002 Jeep Cherokee Overlander ... Passenger-side fan blows but doesn't blow heat ... Driver-side working fine. Any ideas?

 

Mine does that too, never noticed it before because I always drive. It was cold the other night and my wife was in the Jeep (only second time in 6+ months that has happened!) and complained about the cold. Looks like all the heat goes to drivers side because my toes were almost melting and it was luke warm on her side.