TM 5-3805-298-23-1
0117
Table 1. Heater Does Not Blow Warm Air When Temperature Control Panel Is Set on Maximum Heat -
Continued.
0117
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Heater Does Not Blow Warm
Test Step 5. Inspect Heater for
Air When Temperature
Blockage.
1. Turn the ignition switch to the OFF
Control Panel Is Set on
position (TM 5-3805-298-10).
Maximum Heat Continued
2. Remove heater control valve
Heater Control Valve OK -
(Figure 2, Item 2) (WP 0407), and
Proceed to step 3.
inspect for contamination and
Heater Control Valve Contaminated
blockage.
or Blocked - Replace heater control
valve (WP 0407).
Proceed to step 3.
3. Inspect three heater hoses
No Visible Contamination or
(Figure 2, Item 1) and two hose
Blockage Proceed to step 4.
connections (Figure 2, Item 4) for
Heater Hoses Contaminated or
contamination and blockage.
Blocked Replace heater hoses
(WP 0365).
Proceed to step 4.
4. Inspect heater coil (Figure 2,
No Visible Contamination or
Blockage Replace water temperature
Item 5) for contamination and
regulator (WP 0232).
blockage.
Install heater control valve (WP 0407).
Proceed to Test Step 6.
Heater Coil Contaminated - Replace
heater coil (WP 0421).
Install heater control valve (WP 0407).
Proceed to Test Step 6.
0117-6