Honeywell RTH221 Series - Troubleshooting Common Thermostat Issues; Display and System Response Troubleshooting

RTH2300/RTH221
21 69-2606ES—01
Troubleshooting
SETUP WIRING ASSISTANCE 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.