Honeywell T8400C Owner's Manual - Page 11

For service, contact your local heating and cooling contractor

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Page 11 highlights

If you have questions concerning this thermostat, call Honeywell Customer Assistance at 1-800-468-1502, Monday-Friday, 7:00 am-5:30 pm, Central time. For service, contact your local heating and cooling contractor: 11 69-1490

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11
69-1490
If you have questions concerning this thermostat, call
Honeywell Customer Assistance at 1-800-468-1502,
Monday-Friday, 7:00 am-5:30 pm, Central time.
For service, contact your local heating and cooling contractor: