Trane GAF2A0A36S3AEC Installer's Manual page 9

NOTE: FOR GAF2 MODELS, SKIP TO STEP 8.
STEP 7 - Use a 5/16 Allen wrench on the locking
mechanism on each side of the bottom half of the
cabinet to loosen the locking mechanism. The locks
loosen by turning counter-clockwise approximately
3/4 of a turn.
STEP 8 - Lift the Coil section up and away from the
Blower section. Set aside.
Note: When separating the two cabinet
pieces, make sure the gasket remains intact.
9