Ducati

Mine is beginning to act up. so far this winter (PA) I've had to let it warm up for about 10 min before I drive. If I do not do this the trans seems to not want to shift or just plain does what it wants to. But only for a few minutes then it does what it is supposed to. Gonna give her a fluid change in the next couple weeks, 153000 miles on it.

I have the same issue, makes no sense that it would be the heater core. If it was blocked or even a partial blockage then you would get the same type heat out of both sides not just 1 side. Now I have cold air blowing thru both defrost and heat only on the drivers side. the door that switches from defrost to heat/vents works just fine. could it be the blend door? I have manual heat NOT dual zone. gonna fix this in the spring and looking for some help.