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These are the problems our technicians find most often during annual maintenance visits. Many homeowners had no idea until we checked.

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Furnace Has a Cracked Heat Exchanger

A cracked heat exchanger allows combustion gases, including carbon monoxide, to mix with the air circulating through the home. There is often no visible symptom until CO levels become dangerous. We inspect the heat exchanger on every maintenance visit using a combustion analyzer and direct visual inspection of the burner compartment.

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Furnace Flame Sensor Dirty or Failing

A flame sensor coated with oxidation cannot reliably confirm that the burner has lit, which causes the furnace to shut off shortly after ignition and attempt multiple restarts before locking out. This pattern is one of the most common causes of no-heat calls. We clean the flame sensor on every furnace maintenance visit and replace it if the reading falls below the acceptable threshold.

Furnace Capacitor About to Fail

A capacitor reading at 60 to 70 percent of its rated value is still functional but will likely fail within one to two seasons. Capacitor failure stops the blower motor from starting, which puts the system out of service until a repair call is scheduled. We test capacitor health on every maintenance visit and recommend replacement when readings indicate end-of-life is approaching.

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Furnace Flue Blocked or Leaking

A partially blocked or separated flue pipe allows combustion gases to re-enter the living space instead of exhausting safely outside the home. This can happen gradually from joint corrosion, animal nesting, or settlement of the flue pipe. We inspect the full accessible flue run and test draft pressure on every maintenance visit.

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Dirty Burners Reducing Heat Output

Burners accumulate scale and combustion debris over operating seasons, which disrupts the air-to-fuel ratio and reduces combustion efficiency. A furnace with dirty burners uses more gas to produce the same heat and increases carbon monoxide output in the flue. We clean and inspect the full burner assembly as part of every furnace maintenance visit.

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Furnace Gas Pressure Out of Range

Gas pressure at the furnace manifold can drift outside the manufacturer's operating specification due to supply side variations or regulator wear. Running outside the specified pressure range affects combustion quality, efficiency, and in some cases creates a safety risk. We verify manifold and inlet gas pressure against the equipment data plate on every maintenance visit.

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No CO Detector Near the Furnace

Carbon monoxide detectors have a rated life of 5 to 7 years and are required by Edmonton law to be installed near sleeping areas in homes with gas appliances. An expired or absent detector provides no protection against a CO event from a furnace issue. We check CO detector presence and age during maintenance visits and flag homes where protection is missing or out of date.

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Furnace Not Serviced in Over a Year

A furnace that has gone more than a year without professional maintenance may have ignitor degradation, flame sensor buildup, and heat exchanger wear that compound quietly. The risk of a mid-season breakdown or carbon monoxide issue 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.

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Furnace Blower Making New Noise

A blower motor that has developed a new squeal, grind, or vibration is showing early signs of bearing failure or capacitor degradation. Running a motor with failing bearings accelerates the failure and can seize the motor entirely, leaving the furnace unable to distribute heat. We test motor amperage, check capacitor output, and inspect the bearing condition before recommending repair or replacement.

Reviews

What Our Customers Say

★★★★★

Found a cracked component before it failed

The technician found a small crack forming on the heat exchanger during our annual visit. He explained exactly why it mattered and what our options were. Really glad we caught it before winter instead of during a cold snap.

★★★★★

Detailed written report, no pressure

I called Gas Services Edmonton after a neighbor recommended them. The technician walked through every component he checked and gave us a written summary at the end. No pushy upsell, just honest findings.

★★★★☆

Good visit, appointment ran a bit long

Our furnace needed more cleaning than expected since it hadn't been serviced in a few years, so the visit took closer to two and a half hours instead of the estimated hour and a half. Worth it though, the system runs noticeably quieter now.

★★★★★

Explained the combustion test clearly

I didn't realize carbon monoxide testing was even part of a standard maintenance visit until the technician explained it. He showed me the readings on his equipment and confirmed everything was within safe range. That level of detail earned my trust.

★★★★★

Booked early and avoided the fall rush

Called in September like they suggested and got a same-week appointment with no trouble. The technician from Gas Services Edmonton was on time and thorough. Already booked for next year.

★★★★★

First maintenance visit in years, no regrets

Our furnace hadn't been professionally checked since we moved in five years ago. Gas Services Edmonton found a few minor issues and fixed one small thing on the spot. Bills already feel more manageable this month.

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