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Fan
Mode
Day/Night
Outdoor
Press to raise and lower set point. Press both at the
same time to switch between ˚F and ˚C. Press and
release to view current set point.
Press to display
outdoor temperature
(w/optional Model 8041
Remote Outdoor
Sensor only).
Press to select
Heat/Cool/Auto/Off.
(Auto for Models 8534
& 8538 only)
Press for continuous
fan. Press again to
resume to auto fan.
Aprilaire
Digital Heat/Cool Thermostat
Fan icon displays during
continuous fan only.
Heat and Cool Mode
icons. Both displayed
during Auto Mode.
Flame flickers during
heat call and Snowflake
flashes during cool call.
Set-point icon displays
the active set point
(full sun = Day set
point, partial moon
= Night set point).
Press to change
set point to either
the Day or Night
preset value.
Temperature ˚F or ˚C.
Room temp. normally
displayed. Press
Outdoor button to
display outdoor temp.
(Model 8041 Remote
Outdoor Sensor
required).
Displays mode when
changing (Heat, Cool,
Off, and Auto).
(Auto for Models 8534
& 8538 only)
– 2 –
Figure 1 - Display and Button Description
110-964B 7/12/01 9:14 AM Page 4