Owner's Manual

20 69-0628B—1
Problem Check Action
Clock does not run. — thermostat connections at the
two C terminals. If no
connections, clock needs
batteries in order to run.
Batteries may not have been
installed. 2
Install batteries as shown in Fig. 2.
— Batteries may need
replacement.
Replace with two new AAA alkaline batteries as
shown in Fig. 2.
— if new batteries are installed
and clock still does not run.
Replace thermostat.
— voltage across the two
C terminals.
Remove thermostat from the wallplate or
subbase and measure the voltage. Refer to the
Voltage at Clock Terminals table for cause and
reaction.
Troubleshooting (Continued)
1 Applicable to heating-cooling subbase only.
2 If clock is not battery powered, clock can use batteries for backup.
Continued