Honeywell VisionPRO TH8110U Operating Manual page 29

In case of difficulty
Heating or
cooling system
does not respond
Display shows
Fan Auto and On
or Auto and Circ
at the same time
• Press to set system to Heat. Make sure the temperature is set
higher than the Inside temperature.
• Press 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 15).
• 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 7).
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VisionPRO TH8000 Series
®