Tag: RTH6300B Programmable

Honeywell RTH6300B Programmable Thermostat Quick Reference Card Grasp and pull to see basic operating instructions at a glance. Battery Holder Press down and pull to remove the batteries. Batteries should be replaced once a year (see page 15) Need Help  For assistance with this product please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll-free at…