Hi I have a 1986 BMW 535i.
My problem is I have heat coming out of my vents at idle, when I reach speeds of 35+ mph it blows freezing cold air out! It has climate control, I'm thinking maybe bad senser? Dont know where that would be, the A/C belt is off of the compresser, and I tried blocking the fresh air inlet vents on the fire wall with cardboard. If anyone has any ideas or input Please let me know.