Honeywell RTH111 series - Troubleshooting Common Issues

RTH111
11 69-2603ES—01
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securely.
• MakesurefreshAAAalkalinebatteriesarecorrectlyinstalled(see
page 9).
Heating or
cooling system
does not respond
• 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.
• Wait5minutesforthesystemtorespond.
In case of difficulty