2016 Dodge Charger SXT My heat will work okay when the car is first started. It will go cold and stay cold. If heat is on high it will work correctly. I am using it on manual mode. They replaced the humidity sensor as that was the only code they found and it is still doing it. They said the actuators are fine. I googled and can't seem to find anyone with the same issue. Please help me as I really want to keep this car.