My heater control valve in the engine compartment of my car has been replaced, but I'm still unable to turn the heat down from full (and hence the air on won't kick in) Has anyone replaced the control unit behind the dash that the control knob turns? It seems quite a small unit and must surely be a commercially available part (its the square white plastic part at the top of the enclosed picture I took when I had the dash backing off) I'm sure if I could get it off and identified, I'd be able to find it in the RS catalogue. Thanks Simon
