TB 9-2320-302-13&P-3
A/C TROUBLESHOOTING PROCEDURES
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
GENERAL TROUBLESHOOTING
1. Inspect evaporator assembly filter (WP
1. Replace filter if obstructed.
1.
A/C Unit Not Producing Cool
Air.
2. If filter is not obstructed, proceed
to next step.
Refer to A/C System Pressure
2. Check system pressures to ensure all
Diagnosis in this work package.
components are operating correctly.
Repair or replace leaking
components and recharge system
1. Set A/C Fan Switch to OFF position (WP
2.
Compressor Noise or Vibration.
2. Turn ignition key switch to OFF position
(TM 9-2320-363-10).
3. Check to see that belt tension is correct
(120 lb).
4. Check to see if compressor is seized.
hand.
5. Check alignment of pulley.
Tighten compressor mounting bolts
tightness.
7. Check if system is overcharged. System
should contain 3.25 lb of refrigerant.
1. Troubleshoot compressor and thermostat Replace compressor (WP 0016 00) or
3.
(refer to A/C Electrical Troubleshooting, thermostat (WP 0017 00).
Coil - Reduced Air Flow.
Malfunction, step 5).
Refer to A/C System Pressure
Diagnosis in this work package.
assembly for damage. Remove
00) to access wiring harness.