Honeywell RTH8500 - In Case of Difficulty

RTH8500
19
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below.
Most problems can be corrected quickly and easily.
Display is blank • 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 thermostat is battery powered, make sure fresh AAA alkaline batteries
are correctly installed (see page 18).
Button on lower
right of screen
is blank
• This button will remain blank unless the furnace filter change reminder is
activated (see System Setup in your Installation Guide).