FallThermostat set to heat
Before the first cold night
- Put in a fresh filter and write the date on its edge.
- Set the thermostat to Heat and run the furnace once while the weather is still mild.
- Test the smoke and carbon monoxide alarms and put in fresh batteries.
- Clear the space around the furnace: no boxes, paint cans or rags against it.
- Outside, check that the furnace intake and exhaust pipes are clear of leaves and nests, and keep them clear of snow later.
- Open the supply registers and pull furniture off the return grilles.
- Book the tune up before the first cold night, not during it.