Honeywell RTH5100B Operating Manual page 16

Operating Manual
In case of difficulty About your new thermostat
Heating
or cooling
system does
not respond
"Cool On" or
"Heat On" is
flashing
Other problems
69-2330EFS—01
• Press SYSTEM button to set system to Heat. Make sure the
temperature is set higher than the Inside temperature.
• Press SYSTEM button 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.
• Wait 5 minutes for the system to respond.
• Compressor protection feature is engaged. Wait 5 minutes
for the system to restart safely, without damage to the
compressor.
• If the above measures do not resolve the problem,
check the In Case of Difficulty section in your thermostat
Installation Guide.
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