Annual Gas Fireplace Maintenance Checklist for GTA Homeowners

A gas fireplace is one of the easiest comfort upgrades a GTA home can have — flip a switch, and you get warmth and ambience without splitting wood or sweeping ash. That convenience hides the fact that it’s still a gas-burning appliance with combustion, venting, and safety controls that need attention every year.

Most fireplace problems we get called to in November and December — pilots that won’t stay lit, sooty glass, weak flames, that “something’s burning” smell — trace back to a unit that hadn’t been serviced in years. The good news: an annual inspection is straightforward, and a lot of the prep work is something you can do yourself on a quiet summer afternoon.

Why annual service actually matters

A gas fireplace burns natural gas or propane inside your living room. That puts it in the same regulated category as your furnace — combustion has to be complete, venting has to be clear, and the safety devices that shut the gas off in a fault have to actually work. None of that is optional.

Skipping service for a few years doesn’t always cause a dramatic failure. More often, you get gradual issues: a sooting burner that blackens the glass, a thermopile that’s slowly losing voltage so the pilot drops out on cold nights, a blocked vent screen that pushes combustion byproducts somewhere they shouldn’t go. Annual service catches those quietly, before they become a December problem.

It also tends to be a manufacturer warranty requirement. If your fireplace is under 10 years old, documented annual service is often the difference between a warranty repair and an out-of-pocket one.

When to schedule it in the GTA

In Ontario, the sweet spot is late August through early October. Three reasons:

• You’re not using the fireplace, so a half-day appointment doesn’t disrupt anything.
• Technicians have availability — once heating season starts, fireplace work gets pushed behind no-heat calls.
• You catch issues with weeks to spare before the first cold snap, so parts can be ordered without panic.

If you’re already booking your furnace tune-up, ask whether your contractor can do both in one visit. It usually saves a trip charge.

What you can safely do yourself

Before the professional visit, there’s a short list of homeowner-friendly tasks. Do these with the gas fully shut off at the appliance valve and the unit completely cool.

1. Vacuum the firebox. Remove dust, pet hair, and any debris around the burner pan and logs. A soft brush attachment helps.
2. Clean the glass. Use a non-ammonia fireplace glass cleaner. Ammonia-based products (most general window cleaners) can etch the ceramic coating. Buff with a microfibre cloth — no paper towels.
3. Dust the surround and louvres. The vents above and below the firebox move heat into the room; clogged louvres reduce output.
4. Check the exterior vent. For direct-vent units, walk outside and look at the termination cap. Clear away spider webs, leaves, bird nests, and ice/snow during winter checks. The cap must stay unobstructed.
5. Test the remote and thermostat. Replace batteries in the remote and any wall control. A dying battery is the single most common “my fireplace won’t start” cause.
6. Confirm your CO alarm works. Push the test button. Ontario requires a working CO alarm near sleeping areas in any home with a fuel-burning appliance — your fireplace counts.

That’s it for the DIY side. Everything past this point involves gas, electrical, or venting, and belongs with a licensed technician.

What a professional service includes

Here’s what to expect — and what to ask for — during a proper annual gas fireplace service in the GTA.

A thorough visit typically takes 45 to 90 minutes depending on the unit and how long it’s been since the last service. Costs in the GTA as of 2026 run roughly $200–$350 for a straightforward annual service, more if parts are needed.

Safety: CO and gas smells

This is the section worth reading twice.

If you smell gas — a sharp rotten-egg odour — do not flip switches, do not use the fireplace remote, do not light anything. Get everyone outside, then call Enbridge’s 24-hour emergency line at 1-866-763-5427 from outside the home. Only call your HVAC contractor after the utility has cleared the property.

If your CO alarm sounds, get everyone outside immediately, call 911, and do not re-enter until first responders say it’s safe. Symptoms of CO exposure — headache, dizziness, nausea, confusion — can mimic flu. Take them seriously, especially during heating season.

Working CO alarms are non-negotiable in any Ontario home with a fireplace, furnace, boiler, or water heater. Replace alarms every 7–10 years per the manufacturer’s date — they don’t last forever.

Warning signs between annual services

Even with annual service, a fireplace can develop issues mid-season. Call for service if you notice:

• Soot on the glass within a few hours of use (clean burn should keep it clear for weeks)
• Yellow, lazy flames instead of a stable blue-and-yellow flame pattern
• Pilot won’t stay lit after the third attempt
• A persistent burnt or chemical smell beyond the first 30 minutes of the season
• Condensation or staining on walls near the fireplace
• The fan won’t shut off, or won’t come on at all

Some of these — like a sooty glass — overlap with the same combustion fundamentals we cover for a furnace. If your fireplace shares a chimney chase or sits near your furnace flue, it’s worth looking at both. Our furnace service page covers the heating side.

Choosing between traditional and linear units (briefly)

If you’re considering a replacement rather than a repair, the design choice matters for maintenance, too. Modern linear fireplaces have different burner geometry and glass loads than traditional logs sets, and that changes the cleaning routine. We’ll dig into the trade-offs in a future post on linear vs. traditional gas fireplaces — but the short version is that both need the same annual TSSA-licensed service.

When to call Delson Air

Delson Air is a licensed, insured, TSSA-licensed HVAC contractor and an Enbridge Authorized Contractor serving Toronto, Mississauga, Markham, Vaughan, Brampton, Richmond Hill, Oakville, and the surrounding GTA. We service all major gas fireplace brands, and we’ll happily pair the fireplace tune-up with your annual furnace service so your entire heating side is ready for the season in one visit.

Book your annual fireplace inspection before the first cold snap. Call us at (647) 467-9919, browse our services, or reach out through the contact page — we’ll get you on the schedule. Your comfort is our priority.