TM 5-2420-231-23-1
0030
Table 1. Heating and A/C Troubleshooting Procedures - Continued.
030
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7.
Inspect heater control cable (Figure
Heater Control Cable OK - Proceed to
1. Heater Does Not Blow
8, Item 1) for kinks, damage, breaks,
step 8.
Warm Air When
or disconnections to the heater con-
Heater Control Cable Disconnected -
Temperature Control Is
trol valve (Figure 8, Item 3).
Connect heater control cable to heater
Set to Maximum Heat -
control valve (WP 0355).
Continued
Proceed to Test Step 6.
Heater Control Cable Kinked,
Damaged, or Broken - Replace heater
control cable (WP 0357).
Proceed to Test Step 6.
8. Inspect heater control valve (Fig-
Heater Control Valve OK - Heater
ure 8, Item 3) and valve actuator
control cable is faulty. Replace heater
(Figure 8, Item 2) for cracks, dam-
control cable (WP 0357).
age, or difficult-to-move condition.
Proceed to Test Step 6.
Heater Control Valve Actuator
Cracked or Broken - Replace heater
control valve (WP 0355).
Proceed to Test Step 6.
Heater Control Valve Actuator
Difficult to Move - Replace heater
control valve (WP 0355).
Proceed to Test Step 6.
Figure 8. Heater Control Valve and Cable.
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