Hey RX guy. This is not the response we are looking for. When starting the car in the cold mornings, we do not want cold air coming out of the dash vents while the system is waiting for the heat to generate. When the system is waiting for heat, no air whatsoever should come out of the vents. Is this a problem with the duct doors not closing tightly or is there a way to keep all air from coming through the vents until the heat is ready to come on.