ok, I just replaced my heater core and I am finally getting the blazing heat that I have need but I am only getting heat from the floor and defrost. In the pic below it shows the valve in the green circle that opens and closes when you choose either hot or cold from the climate control. Mine does not open or close. There is also no vacumm going from the small hose that is closes the engine out of the two hoses ( I forgot which one ) . Either we didn't plug something in correctly to the back of the climate control or something is up with the heater valve electrically.......Shed some light on this for me guys....Thanks!!!