Air Recirculation Malfunction

AIR RECIRCULATION MALFUNCTION

DIAGNOSTIC AIDS
- If the control A circuit of the recirculation actuator is shorted to ground, the following conditions will occur.
- The recirculation actuator will operate properly when recirculation is requested.
- The recirculation actuator will continually modulate between the outside air and recirculation positions when outside air is requested.
- If the control B circuit of the recirculation actuator is shorted to ground, the following conditions will occur.
- The recirculation actuator will operate properly when outside air is requested.
- The recirculation actuator will continually modulate between the outside air and recirculation positions when recirculation is requested.
- The condition may be intermittent.
- Inspect the recirculation door and the recirculation actuator for the following conditions:
- A misaligned recirculation actuator.
- Broken or binding linkages
- A broken or binding recirculation door
- An obstruction that prevents the recirculation door from operating within its full range of motion
- Missing seals to the recirculation door
- Misaligned seals to the recirculation door

TEST

Steps 1 - 4:

Steps 5 - 8:

Steps 9 - 13:

Steps 14 - 16: