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There are three LED indicators located on the front of the thermostat. They are designed to inform you
about the following:
LED Color Function
AUX Green
• This turns on when the auxiliary (backup) heating is in operation
• This is the second (non-economy) stage of heat
• It turns on 2 degrees below first stage and is not adjustable
CHECK Red
• When this turns on, a malfunction has occurred somewhere in
the heat pump system
• Please contact a qualified service technician as soon as possible
to check your system
EMER Red
• This light turns on whenever the emergency heat is manually
selected (System switch is in the EMER position)
• While in the emergency Heat mode, the heat pump compressor
is off, and the emergency heat (same as the auxiliary heat)
maintains the setpoint temperature
LED Indictors
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