TM 9-4120-407-14
Table 3-3. Unit Troubleshooting Table - Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. FRESH AIR DAMPER WILL NOT OPERATE.
Step 2. Check that control knob (1) is not loose.
Tighten the control knob.
Step 2. Check that the damper door hinges and control linkage are not damaged.
Step 1. Check to see if the shaft is bent.
Step 2. Check to see if the motor housing is cracked or damaged.
Step 1. Check to see if the shaft is bent.
Step 2. Check to see if the motor housing is cracked or damaged.
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