TM 5-2420-231-23-1
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Table 1. Heating and A/C Troubleshooting Procedures - Continued.
030
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Heater Does Not Blow
Test Step 3. Inspect Heater Duct and
Warm Air When
Upper Air Vents.
Temperature Control Is
1. Turn ignition switch to the off posi-
Set to Maximum Heat -
tion (TM 5-2420-231-10).
Continued
2. Remove headliner (WP 0346).
3. Inspect right upper air duct (Figure
Air Duct Has Debris - Remove debris
5, Item 1) and left upper air duct
and install headliner (WP 0346).
(Figure 5, Item 2) for debris,
Proceed to Test Step 6.
cracks, bends, warping, damage,
Air Duct Is Cracked, Bent, Warped, or
or disconnection from machine.
Damaged - Replace upper air duct (WP
0350).
Proceed to Test Step 6.
Air Duct Is Disconnected - Connect
upper air duct (WP 0350).
Install headliner (WP 0346).
Proceed to Test Step 6.
Figure 5. Upper Air Ducts.
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