Cannot get the filter icon to stop flashing on Honeywell RTH230B thermostat! Held filter button, chg'd batteries, took batteries out reinstalled them, held the mode button while removing batteries! Nothing will stop this icon from flashing! Filters are brand new on heating system and only one thermostat filter icon is flashing. Second thermostat is fine!! HELP!!
Heating & Cooling - Honeywell - RTH230B 5-2 Day Programmable Thermostat Large