Honeywell TH9421 Owner's Manual - Page 30

Operating Manual

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Operating Manual In case of difficulty Heating or • Press SYSTEM to set system to Heat. Make sure the temperature is set cooling system higher than the Inside temperature. does not respond • Press SYSTEM to set system to Cool. Make sure the temperature is set lower than the Inside temperature. • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is closed securely. • If "Wait" is displayed, the compressor protection timer is on. Wait 5 minutes for the system to restart safely, without damaging the compressor (see page 13). Display shows Fan Auto and On or Auto and Circ at the same time • This is normal operation. Auto indicates the thermostat is following the programmed fan setting. If Auto and On is shown, the fan is scheduled for "On" during this period (see page 6). 69-1815EFS-06 28

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Operating Manual
69-1815EFS—06
28
Heating or
cooling system
does not respond
•
Press
SYSTEM
to set system to Heat. Make sure the temperature is set
higher than the Inside temperature.
•
Press
SYSTEM
to set system to Cool. Make sure the temperature is set
lower than the Inside temperature.
•
Check circuit breaker and reset if necessary.
•
Make sure power switch at heating & cooling system is on.
•
Make sure furnace door is closed securely.
•
If “Wait” is displayed, the compressor protection timer is on. Wait
5 minutes for the system to restart safely, without damaging the
compressor (see page 13).
Display shows
Fan Auto and On
or Auto and Circ
at the same time
•
This is normal operation. Auto indicates the thermostat is following the
programmed fan setting. If Auto and On is shown, the fan is scheduled
for “On” during this period (see page 6).
In case of difficulty