Common Terms and Where to Find Them
50
Auto changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 47
This feature automatically switches your system from heating to
cooling – and from cooling to heating – whenever necessary when
the thermostat is set in auto mode.
Auxiliary heat (heat pump systems only) . . . . . . . . . . . . . . . .page 34
Most heat pump systems can’t heat a home sufficiently when it gets
very cold outside so they use a supplemental heating source called
auxiliary heat. The system knows when to use this help and does so
automatically. If it’s using auxiliary heat, the display will show
aux heat
on
. You have no control over the auxiliary heat function.
Backlighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 40
Backlighting illuminates your display. When the thermostat is powered
by electricity, the backlight is on constantly at a dim level that brightens
when you push a button. With battery-powered thermostats, the backlight
is off until you press a button.
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