Originally Posted by Ratchet
Possible the driver's side temperature blend door actuator (or the actuator gear) on the way out. Sounds like the system is attempting to relearn the travel limits of the door in question. If a "desirable" range of travel can't be reached, the system basically soft boots.
Yep... that's exactly it. I found an actuator gear "stop" that had broken off and fell behind the carpet to the right of the gas pedal... so that gear is "toast".
Luckily it's a $2 dealer part and there's a great tutorial posted in the forums on how to replace.
The blower motor turning on and off automatically when first started is how the WK2 alerts you to a HVAC fault.
Now just got to figure out how to remove the big plastic panel on the driver side console that hides the heater core lines. Get that off and the actuator should be behind and a little above them. Removing two T20 screws should do it.
At least the dash doesn't need pulled. My God...