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901356 REV A 02/27/19, PG 7 OF 8
Operation of Controls
Adjust to desired
speed.
Blower Speed
Adjust to desired
speed.
Adjust to desired
mode position
(DASH position
recommended).
Adjust to desired
speed.
Adjust to DEFROST position for maximum defrost, or
between FLOOR and DEFROST positions for a bi-level
blend (Compressor is automatically engaged).
Adjust to desired
temperature.
For A/C operation, adjust to
coldest position to engage
compressor (Adjust between
HOT and COLD to reach
desired temperature).
A/C Operation
Heat Operation
Defrost/De-fog Operation
On Gen IV systems with three lever/knob controls, the temperature control toggles between heat and A/C
operations. To activate A/C, move the temperature lever/knob all the way to cold and then back it off to the desired
vent temperature. For heat operation, move the temperature lever/knob all the way to hot and then adjust to the
desired vent temperature. The blower will momentarily change speed, each time you toggle between operations, to
indicate the change.
Blower Speed
Blower Speed
This lever/knob controls
blower speed, from
OFF to HI.
This lever/knob controls
the mode positions,
from DASH to FLOOR
to DEFROST, with a
blend in between.
This lever/knob controls
the temperature,
from HOT to COLD.
Blower Speed
Mode Control
Temperature Control
Temperature Control
Temperature Control
Temperature Control
Mode Control
Mode Control
Mode Control
For maximum heating, adjust
to hottest position (Adjust
between HOT and COLD to
reach desired temperature).
Adjust to desired
mode position
(FLOOR position
recommended).
Blower
Speed
Mode
Control
Temperature
Control
