Frequently asked questions
Display will not come on
Temperature display will not go
lower than 45°F (7°C) or higher
than 88°F (31°C) during
Display shows flashing or steady
Temperature change occurs at the
Heating will not come on
Make sure the batteries are fresh and installed correctly.
Set the System switch to OFF. Remove the batteries and then insert them
backwards for five to ten seconds to reset the thermostat. Replace the
batteries correctly. The display should come on.
You have reached the temperature limit. The setting range is 45°F–88°F
The batteries are low; replace them as soon as possible. See page 18 for
If "bAt Lo" continues to display after replacing the batteries, set the System
switch to OFF and insert the batteries backwards for five to ten seconds.
Then replace the batteries correctly. The display should come on.
Check the program times for the period in question. Be sure that the
indications are correct. Make sure the current day and time are correct.
Reprogram if necessary.
Check that the System switch is set to HEAT.
Check the system fuse or circuit breaker and replace or reset if necessary.
Check for correct wiring and good connections.
If display is blank or displays "bAt Lo," install fresh batteries.
Allow time for the furnace to heat up and the fan to come on before checking
for heat at the register.
If the temperature setting is higher than the current room temperature and
the SYSTEM ON arrow is displayed, the thermostat is operating correctly.
Contact a heating contractor for assistance.
FREQUENTLY ASKED QUESTIONS