Troubleshooting - Honeywell RTH111 Series Quick Installation Manual

Troubleshooting

If you have difficulty with your thermostat, please try the
following suggestions. Most problems can be corrected
quickly and easily.
Display is blank • Make sure furnace door is closed
Heating or
cooling system
does not
respond
securely.
• Make sure fresh AAA alkaline
batteries are correctly installed
(see page 7).
• Set System switch to Heat. Make
sure the temperature is set higher
than the Inside temperature.
• Set System switch to Cool. Make
sure the temperature is set lower
than the Inside temperature.
• Check circuit breaker and reset if
necessary.
• Make sure heating & cooling power
switches are on.
• Make sure furnace door is securely
closed.
• Wait 5 minutes for the system to
respond.
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RTH111
69-2604EF—01