TM 9-4120-403-14
TABLE 3-1. OPERATOR'S TROUBLESHOOTING (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. REDUCED HEATING CAPACITY
Step 1. Check that all doors, windows, and other openings in the room or enclosure are tightly closed.
Tightly close all openings
Step 2. Check operation of TEMPerature control thermostat.
Set control to fully INCREASE; then, if condition improves, adjust properly.
Step 3. Check to be sure fan switch is set properly.
Set switch to HI SPEED.
Step 4. Check to be sure that excessive cold, outside air is not being introduced through the fresh air
damper.
Fully close damper; then, if condition improves, adjust properly. If malfunction still exists, notify
your supervisor.
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