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-Refer to Recirculation Actuator Replacement.
- 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

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