2026-10-01

Before You Crank the Heat: A Carbon Monoxide and Furnace Safety Checklist for St. Albert Homes

October in Alberta is when we all do the same thing: flip the thermostat from cooling to heating and hope for the best. But after sitting idle all summer, your furnace deserves a little attention before it goes into full-time duty for the next six months. Beyond comfort, this is about safety — specifically carbon monoxide (CO), the colourless, odourless gas that a malfunctioning furnace can produce. Here's a straightforward checklist to make sure your home is ready, and safe, before the real cold arrives.

1. Test Your Carbon Monoxide Detectors

This is the single most important item on the list. Press the test button on every CO detector in your home, and check the manufacture date — most units expire after 7 to 10 years. You should have one on every level of your home, especially near sleeping areas. If a detector alarms and stays alarming, don't assume it's faulty: get everyone outside and call for help.

2. Change the Furnace Filter

A clogged filter is the most common cause of furnace headaches. It restricts airflow, forces the furnace to work harder, and can cause the heat exchanger to overheat — which, over time, can crack and leak carbon monoxide. Check your filter monthly through heating season and replace it when it looks dirty. It's the cheapest insurance your heating system has.

3. Clear the Exhaust Vent Outside

Modern high-efficiency furnaces vent through PVC pipes on the side of your house, not up the chimney. After summer, those vents can be blocked by leaves, nests, or garden debris — and once snow arrives, drifts can bury them. A blocked vent can push exhaust (including CO) back into your home, so walk around the house and make sure the intake and exhaust pipes are clear.

4. Watch and Listen on the First Cold Nights

When your furnace first fires up for the season, pay attention. Strange banging, a yellow or flickering burner flame (it should be blue), soot around the furnace, or a furnace that keeps shutting off are all warning signs worth investigating. A healthy furnace hums along quietly and heats evenly.

5. Book a Fall Furnace Tune-Up

A professional tune-up catches the things you can't see: a cracked heat exchanger, a failing gas valve, a weak igniter, or a CO leak that a detector only catches after it's already in your air. A technician will clean the burners, check gas pressure, test the flue, and measure CO levels directly — the kind of peace of mind no checklist can fully replace. If you're looking for a furnace St Albert homeowners trust, a yearly tune-up with a local shop is the standard advice from every manufacturer.

Why Fall Timing Matters

Every HVAC company in Alberta sees the same pattern: the first week of real cold brings a flood of no-heat calls, and suddenly everyone's furnace needs attention at the same time. Booking your maintenance in October means you choose the appointment time, not the weather. It also keeps your warranty valid — most manufacturers require annual professional maintenance as a condition of coverage.

At A1 Heating, we've been helping St. Albert and Edmonton-area homeowners get ready for winter for years. Whether it's a full fall tune-up, a CO safety check, or troubleshooting that noise you noticed last night, our technicians know Alberta heating inside and out.

Ready for winter? Contact A1 Heating today to book your fall furnace maintenance in St. Albert or the surrounding Edmonton area — and rest easy when the temperature drops.