I'm just trying to help out...I have a stop **** on my heater hose that I have can turn off when I use the AC. Do you have one on yours? Check out your heater hose from the motor and ensure that it's hot at the point of entry into the heater core. Heater core getting hot water and you should be feeling air come out of the vents, the last thing is to make sure that when you set your heat controls to "heat" that you hear the vent move into place, like previously stated. Make sure that the heater switch has some stiffness which means that it's connected to a vent to move.

James