Temperature control dial
Subaru Legacy / Subaru Legacy Owners Manual / Climate control / Manual climate control system (if equipped) / Control panel / Temperature control dial

This dial regulates the temperature of airflow from the air outlets over a range from the blue side (cool) to red side (warm).
See also:
Use of engine braking
Remember to make use of engine braking
in addition to foot braking. When descending
a grade, if only the foot brake is used,
the brakes may start working improperly
because of brake fluid over ...
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The wiper operates only when the ignition switch is in the “ON” or “Acc” position. ...
Adverse safety consequences of under-inflation
Driving at high speeds with excessively low tire pressures can cause the tires
to flex severely and to rapidly become hot. A sharp increase in temperature could
cause tread separation, and failure ...
