Operating Manual - Honeywell RTH8500 Operating Manual

Operating Manual

In case of difficulty
Heating or
cooling system
does not respond
69-2220EF—03
• 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 15).
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