69-1638—1 22
FREQUENTLY ASKED QUESTIONS
b. Press simultaneously.
A blank program schedule is displayed and the program is
canceled (Fig. 31).
Fig. 31.

Change a program permanently

Follow steps for programming heating schedule or programming
cooling schedule.
If... Then...
Display does not come on •Make sure the batteries are fresh and installed correctly.
•Set System switch to Off. Remove batteries and insert backward for 5-10
seconds to reset thermostat. Replace batteries correctly; display should
come on.
Temperature display does not go
lower than 45°F (7°C) or higher than
88°F (31°C) during programming.
•Temperature limit setting is reached; range is 45°F to 88°F (7°C to 31°C).
Display shows flashing “bAt Lo.” •The batteries are low; replace them as soon as possible.
•If “bAt Lo” continues to display after replacing batteries, set System switch
to OFF and insert batteries backward for 5-10 seconds. Replace batteries
correctly; display should come on.
Temperature change occurs at wrong
times
•Check program times for period in question. Be sure AM and PM
indications are correct. Make sure current day and time are correct.
Reprogram if necessary.