Filter
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Note: Filter button works only when “FILTER” is displayed on the display. If Filter button is
pressed when “FILTER” is not displayed, the internal counter will not reset.
Your thermostat is pre-programmed at the
factory to cycle when the temperature rises
1° above or 1° below the temperature
setting. It cannot be changed.
■ After 5 seconds, when the filter
counter is reset, the “FILTER”
disappears from the display.
69
c
TEMP
SET TEMP
FILTER
LO BAT
HOLD
HEAT COOL
To Reset Filter Counter To Zero
Temperature Span
Press
FILTER
Press
Your thermostat comes with an electrolumi-
nescent lamp for easy viewing of the display
in the dark. To activate press the “light”
button between the up and down arrow keys.
The display will remain backlit for
approximately five (5) seconds. If another
button is pushed, the five second timer will
reset, and the light will turn off five seconds
after the last button is pressed.
Backlighting (Model 44050 only)
LIGHT