Honeywell RTH3100C - Troubleshooting Common Issues; Display Issues; System Response Problems

Operating Manual
In case of difficulty
If you have difficulty w ith your therm ostat, please try the following suggestions.
M ost problem s can be corrected quickly and easily.
Display is blank
Heating or
cooling system
does not respond
Check circuit breaker and reset if necessary.
Make sure power switch at heating & cooling system is on.
Make sure furnace door is closed securely.
Make sure fresh AA alkaline batteries are correctly installed (see page 9).
Set system switch to Heat (see page 5). Make sure the temperature is
set higher than the Inside temperature.
Set system switch to Cool (see page 5). 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.
10