Honeywell T8090A/191108A 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, old thermostat and air conditioner.
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