BYD e6A Owner's Manual page 108

When installing filter and filter box, keep the
arrow upward.
Tips:
The air filter must be in place. Using the air
conditioner without the air filter will reduce
the dust-proof effect and also affect the
performance of the air conditioner.
--
Defogger for the rear window and outer
rear view mirror (if equipped)
1-90 Air Conditioning System
BYD e6A AUTO Owner's Manual
Press this button switch down to enable the
defogger for the power rear window and outer
rear view mirror to operate.
The power supply should be ON.
The thin heater wires inside the rear window
will clear the glass surface quickly. When the
defogger is operating, the indicator light will
come on.
The defogger turns off automatically after
approximately 15 minutes.
WARNING
Do not touch the outer rear view mirror
surface when the defogger is operating,
because the mirror surface will be hot.
When the glass surface is clear, press this
button switch again to turn the defogger off. If
the defogger continues operating for a long
time, it may cause battery discharging,
especially during stop-go driving. The
defogger is not intended to dry rain and melt
snow.
NOTICE
When cleaning the inside of the rear
window, do not scratch or damage heater
wires or their connectors.
To prevent the battery discharging
unnecessarily, turn the defogger switch off
when the power supply is not ON.