a bit new too all this and wondering if anyone could give me some help working out how to fix the heating control on my car. the basic problem is that the fan control works perfectly but the temperture slider will not go to the cold side!!! meaning i've got to sit in the car with all the windows open as its getting far too hot in there.

can anyone assist in giving me a clue on how to fix this without having to take it to the mechanic.

cheers in advance!