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20 69-0643—1
Problem Check Action
Timer loses time —Batteries may need Replace with two new AAA alkaline
(continued). replacement. batteries as shown in Fig. 2.
1 Not applicable on model used in heating-only system.
2 Not applicable on model used in cooling-only system.
3 If timer is not battery powered, timer may still use batteries for backup.
Troubleshooting (Continued)
If this Troubleshooting section did not solve
the problem, call a qualified service technician
or the Honeywell Customer Assistance Center,
1-800-468-1502, Monday - Friday, 7:00 AM to
5:30 PM Central time for additional assistance.