Auto Climate Control, Problem Blowing Cold Air
i have just got a A6 1.9tdi (AJM) Avant 2001, i noticed a few times the heater blows cold air for no reason and when it should be blowing hot air even though the temps are turned up on the auto climate control.
i done a search but i have no definate answer, the fact it blows hot air most of the time suggests there is nothing wrong with the coolant system or heater matrix.
last night and this morning, whilst in frosty weather, i could not get me heater to blow warm air for about 10 mins into the journey, i was fiddling with the heater controls till i finally got warm air and it was fine after that
what controls the hot/ cold air behind the dash and is it possible this is sticking
once it is warm i have been adjusting the left and right temps up and down by 1deg and the air blowing on that corresponding side changes to suit so the sensors seem to be ok from that point of view.
anything else i can check