How To Turn On Honeywell Thermostat Heat. But when the seasons change, or when you just need a change, even with a programmable thermostat, you're not stuck with the temperatures you've already programmed into your thermostat. Dirty or clogged furnace filters and hvac fan blades can.
If your thermostat is in delay mode, the following messages and icons will be flashing on your thermostat display: If the fuse is good, check the breaker panel. To change your settings, press the “ system ” button again.