737 MAX Flight Crew Operations Manual
Anti-Ice, Rain
Chapter 3
Controls and Indicators
Section 10
MN-FLT-OH-201
3.10.1
10 Controls and Indicators
Controls and Indicators
File Highlight
Window Heat Panel
1
Window OVERHEAT Lights
Illuminated (amber) – overheat condition is detected.
Note:
OVERHEAT lights also illuminate if electrical power to window(s) is
interrupted.
2
Window Heat ON Lights
Illuminated (green) – window heat is being applied to selected window(s).
Extinguished –
• switch is OFF, or
• an overheat is detected, or
• a system failure has occurred
• system is at correct temperature.
3
WINDOW HEAT Switches
ON – window heat is applied to selected window(s).
OFF – window heat not in use.
4
WINDOW HEAT Test Switch (spring–loaded to neutral)
OVHT – simulates an overheat condition.
OVERHEAT
ON
L
WINDOW HEAT
OVHT
SIDE
R
FWD
OVERHEAT
ON
OFF
OFF
ON
ON
FWD
SIDE
PWR TEST
OVERHEAT
ON
OVERHEAT
ON
FORWARD OVERHEAD PANEL
1
2
3
4
March 1, 2021
