Honeywell EnergyPro T8665C, Owner'S Manual, Page: 80 / 88

Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action
Cooling does not The thermostat is part of a If thermostat indicates SAVE, wait until
come on Demand Response event. energy saving event is complete. To
cancel energy saving event, if available,
No power to thermostat. press and hold Run Program.
Check that setpoint is below room
System selection is not set temperature.
to Cool. Check if circuit breaker is tripped—reset
circuit breaker.
Cooling setpoint is above Check if fuse at fuse box is blown—
room temperature. replace fuse.
Check if System switch at equipment is in
Off position—set to On position.
Wait five minutes for System to respond—
(thermostat displays “Wait”).
Set System selection to Cool.
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