Honeywell T8401C1031, Owner'S Manual, Page: 7 / 12

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Troubleshooting Guide
CAUTION
Low Temperature Hazard
Operating at too low of an outdoor temperature
may cause compressor damage.
Do not operate cooling if outdoor temperature is
below 50
°
F (10
°
C). Refer to manufacturer’s
recommendations.
Heating or cooling does not come on.
• Check power to the heating or cooling equipment.
For compressor protection, on initial startup, and
during power interruptions the Thermostat will go
into a 5 minute delay. During this delay, the cooling
icon, a snowflake
, will flash.