Honeywell RTH6450D1009/A User Manual
RTH6350/RTH6450/RET93E0/RET95E0 Series
21 69-2415ES—05
About your new thermostat
In case of difficulty
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Most problems can be corrected quickly and easily.
Display is blank
• Make sure fresh AA alkaline batteries are correctly installed
(see page 15).
Temperature
settings do not
change
settings do not
change
Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
• Cool: 50° to 99°F (10° to 37°C).
To restore
default schedule
settings
default schedule
settings
Follow these steps to restore default schedule settings (see page 10):
1. Press
SET CLOCK/DAY/SCHEDULE.
2. Press
SET SCHEDULE.
3. Press
DONE and NEXT at the same time for 4 seconds.