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AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM DUCTS DURING AC OPERATIONS
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TB-9-2320-279-13-1 Air Conditioning System NSN 4120-01-526-9153 P/N 3528313 for M977 Series 8x8 Heavy Ecpanded Mobility Tactical Trucks (HEMTT) Manual
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Table 3-2. Operator's Troubleshooting (cont)

DRAFT
TB 9-2320-279-13-1
AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM
DUCTS DURING AC OPERATIONS - Continued
Table 3-2.
Operator's Troubleshooting (Continued)
WP
MALFUNCTION
SEQUENCE
TEST OR INSPECTION
NO.
CORRECTIVE ACTION
NOTE
Defrost cable can be pushed in or pulled
out for AC operation. Airflow to upper air duct
will be increased when defrost cable is pulled out.
Step 3. Check if heater cable is pushed in (WP 0004).
Push in heater cable.
Step 4. Check if AC cable is pulled out (WP 0004).
Pull out AC cable.
Step 5. If engine is on, turn engine OFF (TM 9-2320-279-10).
Step 6. Inspect AC condenser assembly for debris and damage.
Clean debris from AC condenser assembly.
If AC condenser is damaged, notify Field Level Maintenance.
HEMAC126
0007-2

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