DIY & Tips
Preparing for Fall: Get Your Home Ready
March 28, 2026 · 9 min read
Key Takeaways
- Schedule your furnace tune-up in September — technicians are booked solid by November
- Seal air leaks before temperatures drop to maximize heating efficiency
- Cover or clean the AC condenser, flush the water heater, and test heating early
- A weekend of fall prep prevents thousands in emergency winter repairs
September in the GTA is the calm before the storm. Temperatures are comfortable, there's no urgency — and that's exactly why it's the best time to prepare your home for winter. Every task on this list takes 15–60 minutes. Do them now, and you'll sail through December without a single panicked service call.
HVAC Preparation
Schedule a furnace tune-up. This is the most important item on the list. A professional heating maintenance visit includes cleaning the burner, testing the igniter, checking the heat exchanger for cracks, verifying gas pressure, and inspecting the flue. Book in September — by November, wait times stretch to 2–3 weeks.
Replace the furnace filter. Start the heating season with a fresh filter. If you've been running AC all summer, the filter may be due even if it was recently changed — summer operation loads the filter faster in homes with pets or renovations.
Test the heating system. Turn the thermostat to heat mode and set it a few degrees above room temperature. Confirm the furnace fires up, all registers produce warm air, and there are no unusual smells or sounds. A slight burning smell on first startup is normal (dust on the heat exchanger) — it should dissipate within 30 minutes.
Prepare the AC for winter. Turn the AC breaker off to prevent accidental cold-weather startup (which can damage the compressor). Clear debris from around the outdoor condenser. You can cover the top of the unit to keep leaves and ice out, but don't wrap it fully — trapped moisture promotes corrosion.
Weatherproofing
Seal air leaks. Walk around the exterior of your home and check weatherstripping on doors, caulking around windows, and seals where pipes and wires enter the house. Replace any dried, cracked, or missing seals. This $30–$50 investment saves $200–$400 in heating costs per season.
Inspect windows. Run your hand around window frames on a windy day — you'll feel cold air where seals have failed. Consider window film for older single-pane windows — it adds an insulating air layer for about $5 per window.
Check attic insulation. If you can see the floor joists, you need more insulation. R-60 is the current Ontario recommendation. Adding blown-in insulation is one of the highest-ROI home improvements available.
Water Heater Maintenance
Flush the tank. Sediment accumulates at the bottom of tank water heaters, reducing efficiency and accelerating corrosion. Attach a garden hose to the drain valve, run it to a floor drain, and flush until the water runs clear. This takes 15 minutes and extends the life of the unit.
Test the T&P valve. Lift the lever on the temperature and pressure relief valve briefly — water should flow freely and stop when you release it. If it drips afterward or doesn't flow at all, the valve needs replacement ($20 part, $100–$150 installed).
Exterior Tasks
- Clean gutters and downspouts. Clogged gutters cause ice dams in winter, which can damage roofing, siding, and soffits
- Disconnect and drain outdoor hoses. Water left in hoses can freeze back into the house and burst the hose bib
- Shut off exterior water valves. Close the interior shut-off for outdoor faucets to prevent frozen pipe bursts
- Inspect the roof. Binoculars from the ground are fine — look for missing shingles, lifted flashing, or damaged vent boots
Safety Checks
- Test smoke and CO detectors. Replace batteries and test every unit. CO detectors are especially critical during heating season when gas appliances run continuously
- Check the fireplace and chimney. If you have a wood-burning fireplace, have the chimney inspected and cleaned before first use. Creosote buildup is a fire hazard
- Locate the main water shut-off. If a pipe freezes and bursts, you need to know where this is — in the dark, under stress. Label it now
Frequently Asked Questions
When should I switch from AC to heat?
Most GTA homeowners switch in mid-to-late October. There's no harm in running both within the same week as temperatures fluctuate. Smart thermostats handle the switch automatically based on your temperature preferences.
How much does a furnace tune-up cost?
$100–$150 for a standard tune-up. A maintenance plan that covers both heating and cooling visits typically costs $150–$250 per year with priority scheduling and discount on parts.
Get Ahead of Winter
A few hours of fall preparation prevents thousands in emergency repairs. Book your fall tune-up or call 1-855-539-4328 before the November rush.