Lower Heating Flap

LOWER HEATING FLAP ADJUSTMENT

Flap Linkage - Left Side Of Unit:

1. Select FULL COOLING mode - loosen clamping setscrew - hold flap fully clockwise against heater box - retighten clamping setscrew.

Check for free movement of flap.

2. Select FULL HEATING mode and check that flap opens fully (against casing).


The lower heating flap functions in all positions except defrost. The position of the lower heating flap is modified by the overriding action of the cam and peg on the upper heating/lower cooling flap operating linkage on the right side of the evaporator case. This linkage gives the correct air blend for all conditions.


In defrost there is no vacuum supply to the lower heating flap vacuum actuator. Therefore, no air flows to the front or rear footwells. In defrost mode, all air goes to screen outlets except for a slight bleed to the footwells or optional setting of the dash end outlets.

Flap Positions:

Check relative positions of flaps for FULL HEATING and FULL COOLING modes.