Furnace Tune-Up Checklist: What's Included in Professional Furnace Maintenance

A yearly furnace tune-up is the best way to prevent mid-winter breakdowns, keep heating bills down, and make sure your furnace is running safely. But what does a furnace maintenance visit actually include? Here's the checklist our licensed technicians at Bridlewood Mechanical follow on every tune-up across Muskoka.

What Is Included in a Furnace Tune-Up?

Safety checks - [ ] Inspect the heat exchanger for cracks, rust, or signs of overheating - [ ] Carbon monoxide test at the furnace and in the living space - [ ] Combustion analysis (flue gas readings) - [ ] Test the high-limit switch, rollout switches, and pressure switches - [ ] Inspect the venting system: chimney liner or PVC intake and exhaust - [ ] Check gas connections for leaks

Burner and ignition - [ ] Clean and inspect the burners - [ ] Clean the flame sensor - [ ] Inspect the hot surface ignitor (or pilot on older units) - [ ] Measure and adjust gas pressure - [ ] Confirm a steady blue flame and proper ignition sequence

Airflow and blower - [ ] Inspect and clean the blower motor and wheel - [ ] Check the capacitor and motor amp draw - [ ] Measure temperature rise and static pressure - [ ] Inspect or replace the air filter - [ ] Check belts (on older belt-drive blowers)

Controls and drainage - [ ] Test the thermostat and calibrate if needed - [ ] Inspect the control board and wiring - [ ] Clean and flush the condensate drain and trap (high-efficiency furnaces) - [ ] Test the condensate pump

Wrap-up - [ ] Run a full heating cycle - [ ] Report on the furnace's condition and any recommended repairs

Why Annual Furnace Maintenance Matters

• Safety. Catch heat exchanger cracks and venting problems before they cause carbon monoxide exposure.
• Reliability. Replace worn ignitors, flame sensors, and capacitors before they fail on the coldest night.
• Efficiency. Clean burners and correct gas pressure mean less fuel wasted.
• Longer furnace life. Well-maintained furnaces regularly reach 15–20+ years.

When Should You Book a Furnace Tune-Up?

Early fall, before the heating season starts, is ideal. For cottages and seasonal properties, book before you rely on the furnace to protect pipes over winter. If you have a heat pump or central AC, a spring cooling tune-up keeps that side running well too.

What Homeowners Can Do Between Tune-Ups

• Change the furnace filter every 1–3 months (how often?)
• Keep vents and returns clear
• Keep outdoor PVC vents clear of snow and ice
• Test CO alarms monthly
• Keep the furnace area clean and free of stored items
• Listen for new noises (what they mean)

Heat Pump and Air Conditioner Tune-Ups

If your furnace works with a heat pump or air conditioner, a complete HVAC tune-up also includes cleaning the outdoor coil, checking refrigerant charge, inspecting the reversing valve and defrost controls, and testing the electrical components.

Save With an HVAC Maintenance Plan

Bridlewood Mechanical's HVAC Maintenance Plans include your annual furnace tune-up, priority service, and reminders, so you never have to remember. We serve Gravenhurst, Bracebridge, and all of Muskoka.

Book Your Free Quote

Call (705) 706-7622 or request a free quote online. Our team will get back to you quickly to book a visit.