Honeywell RTH111 series, Quick Installation Manual

Page: 21 / 48

RTH111
19 69-2604ES—01
Troubleshooting
SETUP
WIRING
ASSIST
ANCE
TROUBLESHOOTING
If you have difficulty with your thermostat, please try
the following suggestions. Most problems can be cor-
rected quickly and easily.
Display is
blank • Make sure furnace door is closed
securely.
• Make sure fresh AAA alkaline
batteries are correctly installed
(see page 7).
Heating or
cooling system
does not
respond
• 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.