What customer support options are available for the Honeywell TH5220D1029?
For assistance with this product, you can visit yourhome.honeywell.com or call Honeywell Customer Care toll-free at 1-800-468-1502. You can also find the model number and date code by turning the thermostat over. (Pages 1, 4)
From the official Honeywell TH5220D1029 Thermostat manual, page 4
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