Honeywell T8400C Owner's Manual - Page 10
Caution - thermostat replacement
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Troubleshooting Guide CAUTION To avoid possible equipment damage, do not operate cooling when outside temperature is below 50°F (10°C). See equipment manufacturer instructions. Heating or cooling does not come on. Temperature setting is too warm or cool. • Check that the SYSTEM switch on the thermostat is set to Heat or Cool. • Check the system fuse or circuit breaker and replace or reset if necessary. • Check for air movement at the register. • Check power to the heating or cooling equipment. • Adjust the temperature by pressing either the ▲ or ▼ key. 69-1490 10
10
69-1490
Troubleshooting Guide
CAUTION
To avoid possible equipment damage, do not operate
cooling when outside temperature is below 50
°
F
(10
°
C). See equipment manufacturer instructions.
Heating or cooling
does not come on.
•
Check that the SYSTEM switch
on the thermostat is set to Heat
or Cool.
•
Check the system fuse or circuit
breaker and replace or reset if
necessary.
•
Check for air movement at the
register.
•
Check power to the heating or
cooling equipment.
Temperature setting
is too warm or cool.
•
Adjust the temperature by
pressing either the
▲
or
▼
key.