I changed the fan blower motor in my 89 240dl a few days ago. As I am only finding out now, there is another component that "commonly fails" in the center of that endless pit (A.K.A. the location of the fan blower motor) that I didn't know about at the time. As luck would have it, I believe the (heater control valve) may be faulty. Well the way I feel about it right now, my grandmother would have to be stuck inside the blower motor casing before I would even think about tearing right back into it again. And I'm nearly certain that anyone who has done the swap themselves can relate to any frustrations I may have about this. Anyway, my question is this: IF it's possible to by-pass the heater control valve by running the two heater hoses together, CAN the heater control valve therefore be safely eliminated WITHOUT affecting the Air Conditioning system? Don't need heater; a\c a must. Any help to my question would be greatly appreciated. Thank you very much.