Honeywell T8090A/191108A Owner's Manual page 19

(continued)
Troubleshooting
Problem
Thermostat setting
and thermometer
reading disagree
(continued).
Clock does not run.
Check
— calibration of thermometer.
— thermostat connections at
the two C terminals. If no
connections, clock needs
batteries in order to run.
Batteries may not have been
installed.
Batteries may need replacement
— if new batteries are installed and
clock still does not run.
— voltage across the two C
terminals.
See instructions on page 24.
Install as shown on page 8.
3
Replace with two new AAA alkaline batteries
as shown on page 8.
Replace thermostat.
Remove thermostat from the wallplate or
subbase and measure the voltage. Refer to
the table on page 22 for cause and reaction.
19
Action
(continued)
69-0574—2