Heat Pump Fault Monitor LED lights red when
heat pump failure is
detected. Switch thermostat
to Em. Ht. and contact you
heat pump service com
pany. Heating with Em. Ht.
is expensive, so act quickly.
Successful Communication Indicator
The thermostat periodically sends and receives
messages. The small triangle right of the
temperature display indicates the thermostat
successfully communicated with the system
controller installed by your Energy Utility.
HEAT PUMP
2
Summary of Contents for EnergyPro T8665C
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