TM 9-2320-387-l 0
1 2-21. HEATER OPERATION 1
a.
b.
c.
d.
e.
Start engine (para.
2-12).
NOTE
Perform step b. for Ml113 models only.
Push fresh air intake lever (3) forward to close grille.
Turn heater fan switch (4) to desired setting, HIGH/LOW.
NOTE
For maximum heat, pull heater control knob all the way out.
Position heater control knob (2) to desired setting.
To shut off outside air, pull out control knob (1).
2-77