Heater-Evaporator Unit Overhaul
1. Remove the self-tapping screws and the vent/defroster duct
2. Remove the self-tapping screw and pipe clamp.
3. Remove the self-tapping screw and core clamp.
4. Pull out the heater core.
NOTE: Be careful not to bend the inlet and outlet pipes during heater core removal.
5. Assemble in the reverse order of disassembly. Make sure that there is no air leakage.