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By Mario Vaghei, General Manager, Aire One Peel Heating & Cooling · Published August 4, 2026 · Facts verified August 4, 2026
Most furnace breakdowns in Peel Region happen in January and February, under the heaviest load, and most of them announced themselves months earlier to anyone who looked. This guide covers how often you should get your furnace serviced, what that visit includes, the jobs that stay yours between visits, and the situations that move the schedule up, with our protection and maintenance plans priced plainly at the end.
In this guide
The annual rule and why fall ·
What a tune-up includes ·
Your jobs between visits ·
When to service more often ·
Warranty, cost, and plans ·
FAQ
Short answer
You should get your furnace serviced once a year, ideally in early fall before the heating season starts, and gas furnaces earn that annual visit twice over: it protects efficiency and comfort, keeps most manufacturer warranties valid, and catches the safety issues, cracked heat exchangers and carbon monoxide risks, that homeowners cannot see.
Between visits, your job is the filter every 1 to 3 months and a clear space around the unit. Aire One Peel, a TSSA-registered fuels contractor, covers the annual visit under its protection and maintenance plans from $10.99 CAD monthly.
The annual rule, and why fall is the moment
Once a year is the standard across the trade, and early fall, September to November, is the right slot because the furnace is about to run near-constantly for five months and any weakness found in October is a scheduled repair instead of a February emergency. A neglected furnace also drifts out of tune quietly, losing efficiency you pay for on every bill without ever announcing a problem, and in Ontario the mechanical work behind that tune-up belongs to certified professionals: gas furnace servicing involves the gas train, venting, and high-voltage components, work performed by TSSA-certified gas technicians through a TSSA-registered fuels contractor.
Safety first: a cracked heat exchanger can leak carbon monoxide with no smell and no visible symptom, which is the single strongest reason the annual inspection exists. Keep working CO alarms in your home, test them monthly, and note that Ontario expanded CO alarm requirements under O. Reg. 87/25 effective January 1, 2026, with the current scope on the TSSA site. If a CO alarm ever sounds, get everyone outside first and call from there. Never open the gas train or burner compartment yourself.
What a professional furnace tune-up actually includes
A real tune-up is an inspection, a cleaning, and a safety test in one visit, not a glance and a filter swap. Here is what the annual visit covers and why each item is on the list.
| Task | Why it matters |
|---|---|
| Heat exchanger inspection | Cracks can leak carbon monoxide |
| Burner cleaning and flame check | Clean combustion, steady blue flame |
| Gas pressure and connection test | Catches leaks and drift |
| Venting and exhaust check | Blocked vents back up combustion gases |
| Blower motor and belt service | Airflow, noise, and wear |
| Safety control and limit testing | Shutoffs must work when needed |
| Thermostat calibration | Accurate temperature, no ghost cycling |
| Condensate drain clearing | High-efficiency units shut down when blocked |
Typical annual tune-up scope for a high-efficiency gas furnace; the exact checklist varies by model per the manufacturer’s maintenance requirements.
Your jobs between visits
The homeowner’s share of furnace maintenance is small, cheap, and genuinely important, and the filter is most of it. A clogged filter starves airflow, overheats the furnace, and is behind a surprising share of no-heat calls that never needed a truck.
| Your task | How often |
|---|---|
| Check and replace the furnace filter | Check monthly, replace every 1 to 3 months |
| Test CO and smoke alarms | Monthly |
| Keep 1 metre around the furnace clear | Always, nothing flammable stored nearby |
| Keep supply and return vents unblocked | Seasonal furniture check |
| Check the outdoor intake and exhaust pipes | After heavy snow or ice |
| Listen for new noises or smells | Ongoing; call when something changes |
Homeowner tasks only; anything involving the gas train, burners, or venting belongs to a TSSA-certified technician.
How often to get a furnace serviced: when once a year is not enough
Some situations move the schedule up, and the pattern is simple: more runtime, more dust, or more risk means more attention. Match your home below.
| Situation | Recommended rhythm |
|---|---|
| Furnace over 15 years old | Annual service, low threshold for a mid-season check |
| Pets, renovations, or heavy dust | Filter monthly, annual service |
| Allergies or asthma in the home | Filter monthly, consider duct cleaning |
| Rental property | Annual service, documented for tenants |
| New furnace in its first years | Annual service, keep every receipt for warranty |
| Heat pump paired with the furnace | Annual service for each system, it runs year-round |
Rhythms reflect standard trade guidance; the manufacturer’s maintenance schedule for your exact model governs. This schedule applies across Mississauga, Brampton, Etobicoke, Milton, Georgetown, Caledon, and Bolton.
Warranty, cost, and the plan math
Skipping the annual visit can cost more than the visit ever would, because many manufacturers require proof of annual professional maintenance to keep parts warranties valid, and a denied warranty claim on a major component dwarfs years of tune-up fees. That is the honest case for a maintenance plan: it turns the annual visit into a small fixed monthly cost and adds repair coverage on top. Our plans price as follows, and the honest caveat is that a plan only pays off if you would otherwise skip or forget the annual visit; a homeowner who books a tune-up every fall without fail can simply pay per visit.
| Heating plan | Monthly price | Coverage highlight |
|---|---|---|
| Bronze Heating | $10.99 CAD* | Maintenance-focused entry plan |
| Silver Heating | $19.99 CAD* | Parts and labour up to $750 CAD per year |
| Gold Heating | $28.99 CAD* | Up to $1,000 CAD per year, no deductible |
Plan prices verified on the Aire One Peel protection plans page, August 2026; asterisked terms and full coverage details per the plans page, subject to change.
Does your furnace need attention now? A 20-second check
Two questions, honest triage. The tables above cover every answer.
Anything unusual right now?
The checker needs JavaScript; the tables above give the same guidance.
How we know this
Compiled by Mario Vaghei from manufacturer maintenance requirements, TSSA guidance on gas appliance servicing, Health Canada carbon monoxide safety guidance, and the verified Aire One Peel protection plan terms, checked August 2026. [INSERT AIRE ONE PEEL DATA: share of winter emergency furnace calls involving units with no professional service in the prior two years, with the N and window.]
Easiest version: never think about it again
A maintenance plan folds the annual tune-up into a small monthly cost with repair coverage on top, or simply book a one-off fall visit. Aire One Peel Heating & Cooling, 1625 Courtneypark Dr E, Mississauga, ON L5T 1V9.
Furnace servicing: frequently asked questions
How often should a furnace be serviced in Ontario?
Once a year, ideally in early fall before the heating season, is the standard across the trade for Ontario furnaces. Older units, dusty homes, rentals, and furnaces paired with a year-round heat pump earn a lower threshold for extra checks, and the filter remains your monthly job in between regardless of the professional schedule.
What happens if I don’t service my furnace?
Efficiency drifts down and bills drift up, small faults grow into mid-winter breakdowns, many manufacturer warranties can be jeopardized for lack of documented maintenance, and the safety checks, above all the heat exchanger inspection that catches carbon monoxide risks, simply never happen. Most of the cost of skipping service arrives later and larger.
When is the best time to service a furnace?
Early fall, September to November, before the heating season puts the furnace under constant load. Anything found then is a scheduled repair on your calendar instead of an emergency call in a January cold snap, and appointment availability is far better before the first cold week fills every contractor’s book.
How often should I change my furnace filter?
Check it monthly during the heating season and replace it every 1 to 3 months, moving to the monthly end of that range with pets, renovations, or allergies in the home. A clogged filter starves airflow and overheats the furnace, and it is behind a large share of no-heat complaints that a two-minute swap would have prevented.
Does skipping maintenance void my furnace warranty?
It can: many manufacturers require proof of annual professional maintenance to keep parts warranties valid, and a denied claim on a major component costs far more than years of tune-ups. Keep every service receipt, especially in a new furnace’s first years, and check your specific brand’s warranty terms for its exact maintenance wording.
Is an annual furnace inspection required by law in Ontario?
For a typical homeowner, annual servicing is strongly recommended rather than legally mandated, but the surrounding rules are real: gas appliance work must be done by TSSA-certified technicians, and Ontario’s carbon monoxide alarm requirements, expanded under O. Reg. 87/25 effective January 1, 2026, are law. Landlords also carry maintenance obligations for tenant safety.
Final verdict
Service your furnace once a year, in early fall, and own the filter in between; that one rhythm covers efficiency, warranty, and the safety checks you cannot do yourself. If remembering is the weak link, a plan from $10.99 CAD monthly automates it, and if your furnace is old enough that every tune-up finds something new, the honest next conversation is our sizing and replacement guidance, starting with what size furnace your home needs before any furnace installation in Mississauga.
Sources and references
Technical Standards and Safety Authority (TSSA), gas appliance servicing and CO alarm requirements incl. O. Reg. 87/25
Health Canada, carbon monoxide safety guidance
Natural Resources Canada, furnace efficiency and maintenance
Aire One Peel protection and maintenance plans, verified pricing
Mario Vaghei
General Manager, Aire One Peel Heating & Cooling
Mario compiled this maintenance guide from manufacturer maintenance requirements, TSSA and Health Canada safety guidance, and the verified Aire One Peel plan terms, checked in August 2026.