I have a 2011 F150 eco. I had no heat anywhere on the drivers side, dealer said I needed a blen door actuator, $1,100. Checked out some vids online and seen where people were replacing without taking off dash so I had the dealership order the part all ready to do it myself. The part number however is different than the vids, they sold me YH-1933. Is this possibly the lower of the actuator that needs the dash removed. The upper sems to be fairly easy by removing the radio. Any advise appreciated.