Honeywell T8090A Owner's Manual page 26

If you have questions regarding the installation and programming of your Honeywell thermostat,
please contact the Honeywell Customer Assistance Center at 1-800-468-1502, Monday-Friday,
7:00 AM to 5:30 PM, Central time. Before you call, please have the following information available:
make and model of furnace, thermostat, and air conditioner.
26 69-0628B—1