Download Removing and Installing/Replacing Heater and Air Conditioning Fan (M50, S50, M52) Additional work on 2-door model: Remove console for the windshield wiper system. Position windscreen wiper, left, vertically. Note: The air conditioning system remains installed. Illustration shows air conditioning unit removed. Installation note:Install fan motor and fan gears individually in air manifold box and assemble there. Install blower wheel on shaft of blower motor os that colours match. The arrow on the blower indicates the correct installation position of the blower wheels.