OPERATING CONTROLS AND PROCEDURES MLC90A-1/MLC100-1 OPERATOR MANUAL
3-20
Published 12-10-19, Control # 258-05
Overhead Console
Table 3-6. Overhead Console
Item Name Description
1 Blower Fan Speed Switch
• CLOCKWISE faster.
• COUNTERCLOCKWISE slower.
2 Temperature Switch
• CLOCKWISE hotter.
• COUNTERCLOCKWISE cooler.
3 HVAC Selector Switch
• LEFT end, heater.
• RIGHT end, air conditioner.
NOTE The shut-off valves in the heater hoses at the engine must be open for
heater operation. The shut-off valves can be closed to block hot water
flow through the heater core during warm weather.
4 Outside Air Switch
• LEFT end, off.
• RIGHT end, on. Draws in and circulates outside air.
5 Windshield Wiper Switches
A = front windshield and B = upper windshield wiper.
• Toggle fully down = OFF.
• Toggle up = INTERMITTENT depending on how far
up the toggle is moved.
• Toggle fully up = HIGH speed.
• Press the TOP END of the switch to SPRAY
WASHER FLUID onto the windows.
During cold weather, fill the windshield washer tank with
a non-freezing cleaning fluid.
Cab heater shut-off valve at
engine (Qty 2). Shown closed.
Turn counterclockwise to open.
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