Just had this happen to me this week, and after reading all the posts prepared to change the actuator. Had the same symptoms. . . randomly stopped blowing out of main vent (after an alignment). . . pulled fuse, opened up the dash and looked at actuator, not moving. Couldn't easily figure a way to get it out using socket and 7/32 (because I didn't have the 5.5mm). Went to find one, no joy at the box stores. . . but Harbor Freight had a 40pc set that had one in there. . . come home; get under there, and thought to try re-calibration again. . . nothing, then remembered I had it unplugged, plugged it back in and voila. . . back in business. Call it dumb luck, but I think you can unplug the actuator, go through the calibration and then plug it back in as if it were calibrated and it finds the place where it left off. Saved me the blind ratcheting with big hands in a small space while wondering how I would get the new one installed, with thoughts of why did I buy this SENSITIVE machine. But, I'm all good and happy now. . . Maybe just lucky, but minus well just try: 1-pull fuse (to reset), 2-pull cords from non-working actuator, 3-replace fuse, 4-re-calibrate, 5-plug cords back into actuator, and act like everything is normal again!