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Annual maintenance is where problems get found before they become breakdowns. Here are the issues our technicians encounter most often during furnace maintenance visits.

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Dirty Burners Causing Weak or Uneven Heat

Dust, rust scale, and debris accumulate on burner ports over a heating season, disrupting the flame pattern and reducing combustion efficiency. A dirty burner assembly forces the heat exchanger to work harder to transfer the same amount of heat, which wastes gas and shortens component life. We clean the burner assembly thoroughly on every maintenance visit and verify the flame pattern is correct before completing the inspection.

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Heat Exchanger Crack Found During Inspection

Heat exchanger cracks or fatigue develop gradually over years of thermal cycling and are often invisible during a basic visual inspection. A breach in the heat exchanger allows combustion gases, including carbon monoxide, to enter the air circulating through the home. We inspect the heat exchanger with the system running under load to catch any movement or signs of failure that only appear when the metal is hot.

Furnace Ignitor Failing Intermittently

Hot surface igniters degrade over time and may begin failing intermittently before stopping altogether. A furnace that hesitates before lighting, or that makes repeated clicking sounds before the burner comes on, often has an igniter nearing the end of its service life. We test igniter resistance and timing during maintenance visits and replace units approaching the failure threshold.

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Blower Moving Less Air Than It Should

A blower wheel caked with dust loses its ability to move air efficiently, forcing the motor to work harder to push the same volume through the ductwork. This raises the motor's amp draw, increases energy consumption, and can trigger the high-limit switch prematurely. We clean the blower wheel by hand on every maintenance visit to restore full airflow and reduce motor strain.

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Furnace Gas Pressure Out of Range

Gas pressure at the manifold can drift over time due to regulator wear or supply-side changes, causing the furnace to run lean or rich relative to its design parameters. Running at incorrect gas pressure affects combustion efficiency, increases carbon monoxide production, and stresses the heat exchanger. We measure and adjust manifold pressure during every maintenance visit to confirm the system is operating within the manufacturer's specification.

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Flue Vent Obstructed or Backdrafting

Flue obstructions from bird nests, insect debris, or frost blockages at the vent termination can cause the furnace to shut down on a pressure or safety switch, or worse, allow combustion gases to back-draft into the home. We inspect the full venting path, including the exterior termination, during every maintenance visit and clear any obstructions found.

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Furnace Flame Sensor Too Dirty to Work

The flame sensor verifies that the burner has ignited before the gas valve opens fully. When the sensor surface becomes coated with oxidation, it loses conductivity and may cause the furnace to shut down on a false safety lockout, even when the flame is present. We clean and test the flame sensor as part of every maintenance visit to keep this small but critical component working reliably.

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Furnace Making Banging or Popping Sounds

A bang or pop when the furnace fires is almost always a delayed ignition issue, where gas builds up briefly in the combustion chamber before lighting. This puts mechanical stress on the heat exchanger with every cycle. We clean the burner ports, verify gas valve timing, and check ignition sequence to eliminate the delay and protect the heat exchanger from progressive damage.

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Furnace Not Serviced in Over a Year

A furnace that has gone more than a year without maintenance may have ignitor degradation, burner buildup, and heat exchanger fatigue that compound quietly season over season. The risk of a mid-season breakdown increases with each season skipped. We assess the full system condition during a catch-up visit and address what needs correction before the heating season begins.

Reviews

What Our Customers Say

★★★★★

Caught a dirty sensor before it became a bigger issue

Our furnace had been shutting off randomly for weeks and we assumed it needed a full repair. The Gas Services Edmonton technician found it was just a dirty flame sensor during our annual maintenance and cleaned it right there.

★★★★★

Thorough and quick, no upsell

The technician went through every component on the checklist and explained what he was doing as he went. No pressure to book anything extra, just a clean, honest maintenance visit.

★★★★☆

Good visit, took a bit longer due to access

Our furnace is tucked into a tight closet so the visit ran a little longer than the estimate. The technician was patient about it and did a genuinely thorough job despite the tight space.

★★★★★

Explained our filter choice clearly

We didn't realize our filter was too restrictive for our furnace until the technician explained it during the visit. Gas Services Edmonton recommended a better option and our system runs noticeably quieter now.

★★★★★

Booked before winter and glad we did

We scheduled maintenance in early fall like recommended and it made a real difference once the cold weather hit. The furnace has run smoothly all season without a single issue.

★★★★★

Found a loose electrical connection we didn't know about

Gas Services Edmonton flagged a loose wire during our maintenance visit that could have caused a real problem down the line. Genuinely appreciated the thoroughness beyond just the basic cleaning.

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