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The LEDs on the thermostat may have several different meanings, depending on system, setup and operation.
MENU
72
77 H
11:15 AM
Sys Off
Run
Filter
LED 1
MODE FAN RUN
74 C
LED 2
LED 3
LED 4
LED On/Off Text Description
LED 1 (Green)
System Operation display
Off Sys Off HVAC system is OFF
Off WAIT Minimum Off Time (MOT) delay is active
See InstallerÎSettings on page 25 for more information.
On Cool On Cooling system is running
On Cool On Cooling Min Run Time (MRT)
See InstallerÎSettings on page 25 for more information.
On Heat On Heating system is running
On Heat On Heating Minimum Run Time (MRT)
See InstallerÎSettings on page 25 for more information.
LED 2 (Green)
System Stage display
Off None 1st stage heating or cooling.
On 2nd Stg Stage 2 heating or cooling is active
On Aux Heat Aux Heat – heating is active
Flashing E Heat Emergency Heat – heating is active
LED 3 (Green)
Run/Hold/ESM display
Off Run Schedule mode is active
On Hold Temperature hold is active
On ESM (Energy Savings Mode) temperature preset is active
LED 4 (Red)
System Alert display
Off None No alerts or messages
On Filter Filter run timer reached
See FilterÎService on page 20 for more information.
On Maint Maintenance run timer reached
See MaintenanceÎService on page 21 for more information.
LED Reference
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