A fall home systems checklist for a Colorado home covers a furnace check and professional tune-up, testing smoke and carbon monoxide detectors, starting the humidifier, blowing out sprinklers and winterizing hose bibs, testing the sump pump, replacing the filter and setting a heating-season thermostat schedule.
Work with a deadline: before the first hard freeze
Three jobs are time-sensitive here, and all of them should be done in September rather than October.
Sprinkler blowout. Water left in irrigation lines, valves and backflow preventers expands when it freezes and splits them. A compressor pushes the water out. Schedule it in September — by October the irrigation companies are backed up and the freeze does not wait.
Hose bibs. Disconnect every hose. A hose left attached traps water in the spigot even on a frost-free bib, which is the single most common cause of a burst exterior line. Then shut off the interior valve to each spigot, open the outside spigot to drain it, and leave it open through winter.
Outdoor plumbing and drainage. Drain and store hoses out of the sun, shut off and drain any outdoor kitchen or pool line, and confirm the sump discharge line drains completely so it will not freeze solid. Our big daily temperature swings — a 40-degree shift between afternoon and night is ordinary here — mean a line can thaw and refreeze repeatedly.
Furnace and heating
Your furnace has been idle since spring. Give it a homeowner pass and then book the professional one.
- Replace the filter before the first run. A clogged filter is the most common cause of furnace trouble.
- Clear several feet around the furnace and remove anything flammable stored nearby.
- Open and unblock supply and return registers throughout the house.
- Run a test cycle on a cool day and confirm the furnace fires and reaches temperature.
- Note noises and smells. A brief dust burn-off on first run is normal. A persistent burning smell, banging, or a sulfur odor is not.
- Check exterior intake and exhaust vents for nests, debris and later for snow blockage.
Then schedule heating maintenance. The combustion, heat exchanger and safety checks are not homeowner work, and at 6,035 feet combustion equipment is derated for altitude and must be set up accordingly.
Smoke and carbon monoxide detectors
Fall is the right anchor for detector work because carbon monoxide risk rises the moment combustion appliances start running daily. A cracked heat exchanger, a blocked flue or a backdrafting water heater all produce CO, and all are heating-season events.
Press the test button on every smoke and CO alarm. Replace batteries in any unit that uses them. Check the manufacture date printed on the back of each unit — smoke alarms are replaced roughly every ten years and CO alarms sooner, typically five to ten depending on the model. Vacuum dust off the covers while you are up there, because dust causes nuisance alarms.
Make sure you have CO coverage near sleeping areas and on every level, especially near the furnace and any gas appliance. If you do not have working CO detection, that is the first thing to fix on this list.
Humidifier startup
Colorado winters are brutally dry. Indoor relative humidity routinely drops below 20%, which causes static shocks, cracked wood trim and furniture, dry sinuses, and a house that feels colder than the thermostat says it is.
Starting a whole-home humidifier in fall takes a few steps: replace the evaporator pad or canister, open the water supply valve that was closed for summer, open the bypass damper to its winter position, and set the humidistat. Start around 35% and watch your windows. If condensation forms on the glass, dial it back — that moisture is condensing inside wall cavities too.
Sump, filter and thermostat
Run a water test on the sump pump before winter and pay particular attention to the discharge line, since a line holding water will ice up after the first freeze and leave the pump running against a plug.
Set a heating-season thermostat schedule rather than nudging the dial. Lower while you sleep and while the house is empty, warmer when you are home and awake. Consistent setbacks save real fuel over a Colorado heating season, and a programmable or smart thermostat handles it without anyone remembering.
Finally, reverse ceiling fans to turn clockwise on low. That pushes warm air pooled at the ceiling back down the walls without creating a draft.
What a licensed technician does that you can't
The fall list has the sharpest DIY boundary of any season, and it is all on the heating side.
A licensed technician inspects the heat exchanger for cracks — a crack lets combustion gases including carbon monoxide into your supply air, and you cannot see it without pulling the unit apart. They test combustion with an analyzer, verify draft and venting, clean the burners and flame sensor, check the inducer and pressure switches, and confirm every safety control actually functions rather than just appearing intact.
They also verify the unit is configured for altitude, which matters at 6,035 feet and is regularly missed on equipment installed with sea-level defaults. They measure temperature rise across the heat exchanger against the nameplate range and check gas pressure at the manifold. All of that is gas and combustion work, and none of it is DIY under any circumstances.
Book it early. Everyone calls the week of the first cold snap, and emergency heating repair on a 10-degree night is a worse experience than a September appointment.
Frequently asked questions
When should I blow out my sprinklers in Colorado Springs?
Schedule a sprinkler blowout in September. The first hard freeze in the Colorado Springs area typically arrives in early-to-mid October, and water left in irrigation lines, valves and the backflow preventer expands as it freezes and splits them. Waiting until October means competing for appointments against a deadline that does not move.
How do I winterize an outdoor faucet?
Disconnect every hose first — a hose left attached traps water in the spigot even on a frost-free bib, and that is the most common cause of a burst exterior line. Then close the interior shutoff valve serving that spigot, open the outside spigot fully to drain the remaining water, and leave it open through the winter.
When should I schedule a furnace tune-up?
Late summer or early fall, before the first cold snap. You confirm the furnace is ready while appointments are still easy to get, rather than joining everyone whose heat failed on the same freezing night. The combustion, heat exchanger and venting checks in a professional tune-up are the ones a homeowner cannot perform.
Why do I need a humidifier in Colorado?
Colorado winters are extremely dry, and indoor relative humidity in a heated home routinely drops below 20%. That causes static shocks, cracked wood trim and furniture, dry sinuses and irritated skin, and it makes a house feel colder than the thermostat reads. A whole-home humidifier holds indoor humidity in a comfortable range all season.