Honeywell T8400C1099 Owner's Manual - Page 7
Caution
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Troubleshooting Guide CAUTION Operating at too low of an outdoor temperature may cause compressor damage. Damage to compressor possible. 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 T8400 and T8401 Electronic Thermostats go into a five-minute delay. During this delay, the cooling icon, a snowflake flashes. • Check that the SYSTEM switch on the thermostat is set to Heat or Cool. 7 69-1491-1
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69-1491–1
Troubleshooting Guide
CAUTION
Operating at too low of an outdoor temperature
may cause compressor damage.
Damage to compressor possible.
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 T8400 and T8401 Electronic
Thermostats go into a five-minute delay. During this
delay, the cooling icon, a snowflake
flashes.
•
Check that the SYSTEM switch on the thermostat is set
to Heat or Cool.