Honeywell T8090A/191108A Owner's Manual page 21

(continued)
Troubleshooting
Problem
Clock loses time
(continued).
Not applicable on model used in heating-only system.
1
Not applicable on model used in cooling-only system.
2
If clock is not battery powered, clock may still use batteries for backup.
3
If this Troubleshooting section has not solved the problem, call your qualified heating service
technician or Honeywell Customer Assistance Center, 1-800-468-1502, Monday-Friday, 7:00 AM to
5:30 PM, Central time, for additional assistance.
Check
— batteries may need replacement. Replace with two new AAA alkaline batteries
as shown on page 8. We recommend
Energizer ® batteries.
21
Action
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