TM 5-2420-231-23-1
0030
Table 1. Heating and A/C Troubleshooting Procedures - Continued.
030
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Heater Does Not Blow
3. Remove instrument panel right-
Warm Air When
side cover (WP 0176).
Temperature Control Is
4. Inspect front lower vent hose (Fig-
Vent Hose OK - Proceed to step 5.
Set to Maximum Heat -
ure 4, Item 3) and rear lower vent
Vent Hose Kinked, Damaged, or
Continued
hose (Figure 4, Item 2) for kinks,
Disconnected - Connect or replace
damage, or disconnection from
vent hose (WP 0350).
right heater duct (Figure 4, Item 1).
Proceed to Test Step 6.
Figure 4. Vent Tube.
0030
5. Remove right-side covers (WP
Heater Duct Cracked or Damaged -
0346) and inspect the heater duct
Replace heater duct (WP 0350).
for damage, cracks, looseness, or
Proceed to Test Step 6.
blockage.
Heater Duct Loose or Blocked With
Debris - Install or remove blockage
from heater duct.
Install right-side covers (WP 0346) and
instrument panel right-side cover (WP
0176).
Proceed to Test Step 6.