My thermostat isnt kicking on my furnace. even if i use the arrow to increase it, still no heat and it isnt kicking on the furnace. even tried changeing the batteries. sometimes it will say,"return" n
Changing the batteries
Water Heaters - Honeywell - RTH221B1000-OB Open Box Basic Programmable Thermostat
Answers & Comments
Recheck that the thermostat is wired correctly. If so,switch it to fan on and see if the fan comes on if the fan does not come more then there is definitely an issue with the furnace and not the thermostat.