TM 5-2420-231-23-1
0030
Table 1. Heating and A/C Troubleshooting Procedures - Continued.
030
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. A/C Does Not Blow Cold
3. Rotate A/C temperature switch
Little or No Air Exits From Lower Air
Air When A/C
(Figure 16, Item 1) to the coolest
Vents - Proceed to Test Step 2.
Temperature Control Is
setting, observe A/C system pres-
Little or No Air Exits From Upper Air
Set to Maximum Cold -
sure indicator (Figure 16, Item 2)
Vents - Proceed to Test Step 3.
Continued
(TM 5-2420-231-10), and verify
Little or No Air Exits From All Air
that cool air is exiting from air
Vents - Replace cab air filter element
vents.
(WP 0347).
Proceed to Test Step 9.
No Cool Air Exits From Air Vents and
A/C System Pressure Indicator Is Not
Illuminated - Proceed to Test Step 4.
No Cool Air Exiting From Air Vents
and A/C System Pressure Indicator
Is Illuminated - Proceed to Test Step 5.
Figure 16. A/C Temperature Switch and A/C System Pressure Indicator.
0030