Thanx Ravi to writing this useful & informative topic. You did it DIY. Today I checked my AC button. I killed engine without putting air-con OFF. After that I gave turned key to MAR position only gave ignition.I didn't start engine. Blower of Air-con didn't came ON. As per your statement blower ought to have started after giving ignition due to its memory function But didn't happened as per statement quoted by you. If I am not wrong other cars also has same feature. I mean if I forget to put OFF Air-Con of my M SX4,it also restart at next ignition. But battery of my SX4 doesn't discharge. If this is common in all cars then battery of other cars should also discharge. Please clarify. P.S. :- Still I will check again. Because battery of 4 month old SX4 discharged within 3-4 hrs due to some unknown reason.