Your Fall Furnace Checklist Before Oklahoma's First Freeze

Oklahoma weather doesn't give much notice. It's 85 degrees the first week of October, and by the middle of the month there's frost on the windshield. The furnace that sat untouched all summer gets asked to run all night — and that first cold night is when we get the most no-heat calls of the year.

Run it before you need it

On a mild day, turn the thermostat to heat and let the system run for 15 to 20 minutes. A faint burning smell from dust on the heat exchanger is normal and should clear quickly. Anything that lingers, smells acrid, or smells like gas means shut it down and call someone.

Replace the filter and open the vents

A dirty filter strains the blower and can trip a limit switch, which shuts the furnace off just when it's working hardest. Walk the house and make sure supply and return vents aren't blocked by furniture, rugs, or boxes that migrated over the summer.

Test the safety equipment

Every gas-heated home needs a working carbon monoxide detector on each level, and fall is the natural time to replace batteries. This is the one item on the list with no acceptable shortcut.

Clear the area around the unit

Garages and utility closets collect things all summer. Keep a few feet of clearance around the furnace, and keep paint, gas cans, and solvents well away from any appliance with a flame.

Check the thermostat and the schedule

If you have a programmable or smart thermostat, update the schedule for shorter days. If your system short cycles or the temperature never matches the setting, the thermostat itself is sometimes the cheap fix — and sometimes the first symptom of something bigger.

Seal the easy leaks

Weatherstripping on exterior doors, caulk around window trim, and insulation in the attic access hatch all cost very little and take load off the furnace every single night of winter.

When to call a technician

Yellow or flickering burner flames, banging on startup, a blower that never shuts off, sharply higher gas bills, or heat that doesn't reach the far rooms are all worth a professional look. A fall tune-up is a fraction of what an emergency call on the coldest night costs.

We service furnaces and heat pumps across Shawnee, Tecumseh, and Pottawatomie County. Get on the schedule in early fall and you'll never think about it again until spring.