318IS heater problem

[jonniwal]

Hi Guys
I need help, My 1994 318IS has developed a strange problem with the heater control, When Im" in slow traffic the heater blows hot only no matter where the control is set, At the same time the temp gauge drops slightly, At all other speeds there is no problem and all controls are normal

Hope someone can help

Cheers

John

[camnipotent]

I am not exactly sure, but I think that has to do with the AC. I think the AC needs some engine airflow for it to work really well. My old car had the same problem. The AC could work while idling, but I noticed that when I started driving it became much colder. It could be your freon is so low that it needs the airflow to produce any coldness at all. I'd check into that.