Anybody know how to reset the heater to stop automatic demisting. Everything works fine on both normal and A/C including temp settings and directions but constantly demisting from top dashboard vents. I'm using the car and it's fine with the A/C on cold, directed thru these vents as it cancels the hot air out. Had battery disconnected but only to avoid airbag lights while doing handbrake. I've read these things do this to avoid any danger of car misting up but is there a way of resetting it.
