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• The DECREASE button or INCREASE button will temporarily change the set point
a maximum of ±6°F (±3°C) for a period of 3 hours, before the thermostat
automatically returns to the original program.
If the thermostat does not respond when a button is pushed it may be because the keypad has been
locked. A Lock icon “ “ will appear when a button other than OUTDOOR is pushed if the keypad
has been locked.
No. 5 – Normal Heat Pump/Add-on Heat Pump. This switch is factory preset to the OFF position to
operate in the Normal heat pump mode. If your heating and cooling system is an add-on heat pump
configuration, your contractor changed the position of this switch to match your equipment. Do not
change the position of this switch as it could result in extraordinarily high operation costs.
No. 6 – Single-/Multi-Stage Outputs. This switch is factory preset to the ON position, allowing the
thermostat to operate 2-stage heat pumps. Do not change the position of this switch without first
consulting your installing contractor. Two-stage systems will not operate properly with the switch
set for single-stage outputs.
No. 7 – Free LED 1 with LCD Filter Symbol. When moved to the ON position, this switch turns on a
Replace Filter icon on the display screen when a 24-volt signal is sent to LED 1 (top left edge of the
110-793B 7/11/01 3:29 PM Page 24