TM 9-2320-211-10
TABLE 3-2. TROUBLESHOOTING
(Cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
51. Heater blower motor operates, but heated air fails to reach cab.
Step 1. Cleck for restricted adapter elbow.
Push AIR control handle in toward instrument panel to open damper in
adapter elbow.
Step 2. All other causes.
See organizational maintenance unit.
52. Defrosters fail to operate.
Step 1. Check for restricted diverter assembly.
Adjust DEFROSTER control handle to increase heated air supply to
windshield.
Step 2. All other causes.
See organizational maintenance unit.
53. Engine fails to reach operating temperature.
Check if center flap of radiator brush guard cover is opened.
Roll center flap down.
54. Engine temperature approaches 195F.
Step 1. Check if center flap of radiator brush guard cover is closed.
Roll up center flap and secure.
Step 2. C h e c k coolant level.
Adjust coolant level.
Step 3. All other causes.
See organizational maintenance unit.
TA 067168
3-34