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A proper furnace inspection covers every component that affects safety, reliability, and efficiency. Here are the key issues we find and address during each visit.

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Cracked Heat Exchanger Found

A cracked heat exchanger allows combustion gases, including carbon monoxide, to mix with the air circulating through your home's ductwork. The crack is often too small to see without a proper inspection and does not produce obvious symptoms early on. We visually inspect the heat exchanger and test for combustion gas presence during every furnace inspection to catch this before it becomes a serious safety risk.

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Furnace Flame Sensor Needs Cleaning

A flame sensor coated in residue cannot confirm to the control board that the burner is running, which causes the furnace to shut off after a few seconds and eventually lock out. This is one of the most common causes of a furnace that fires briefly and then stops heating. We test and clean the flame sensor during every inspection and replace it when the condition warrants.

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Flue Vent Blocked or Disconnected

A blocked, disconnected, or incorrectly pitched flue pipe can prevent the furnace from exhausting combustion gases safely, causing back-drafting or automatic safety shutdowns. Animals nesting in exterior vent terminations, shifted PVC joints, and debris accumulation are common causes. We inspect the full venting path from the furnace cabinet to the exterior termination as part of every inspection.

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Furnace Filter Severely Restricted

A filter clogged beyond its rated capacity forces the furnace to work harder, raises the heat exchanger temperature above design limits, and causes the limit switch to trip and short cycle the system. Over time, repeated overheating accelerates heat exchanger wear. We assess filter condition during every inspection and confirm that airflow through the system is within the required range.

Furnace Ignitor Failing Intermittently

Hot surface ignitors degrade gradually and can pass a basic visual check while still being close to failure. A weak ignitor produces a flame on some startup attempts but fails on others, causing inconsistent heating that worsens until the ignitor fails completely. We test ignitor resistance during the inspection to catch components approaching failure before they cause a breakdown.

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Carbon Monoxide Detected at the Furnace

Carbon monoxide can be present in a home's heating air supply at levels too low to trigger a detector alarm but high enough to cause symptoms over time. A CO screening during furnace inspection checks for presence at the furnace cabinet, flue connections, and supply registers to catch combustion gas pathways that should not exist. Finding CO during an inspection is a safety intervention, not a routine finding.

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Furnace Locking Out or Showing Error Codes

Control boards store fault codes that can point to recurring problems even when the furnace appears to be running normally between events. Limit switches and pressure switches that are borderline may allow normal operation most of the time while creating intermittent failures under heavy load. We read stored fault codes and test each safety switch under operating conditions during inspection to catch these patterns.

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Furnace Not Inspected in Over a Year

A furnace that has gone more than a year without a professional inspection may have developed ignitor degradation, heat exchanger fatigue, or vent obstruction that is invisible during normal operation. The risk of a mid-season breakdown or carbon monoxide issue increases with each season skipped. We provide documented findings after every inspection so homeowners have a clear record of system condition.

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Yellow or Flickering Furnace Flame

A healthy gas furnace burner should produce a steady blue flame. A yellow, orange, or flickering flame indicates incomplete combustion, which increases carbon monoxide production and reduces heating efficiency. The cause is usually dirty burner ports, low gas pressure, or an air-to-fuel ratio problem. We clean the burners, verify combustion air supply, and check gas pressure to restore a correct, stable flame.

Reviews

What Our Customers Say

★★★★★

Caught a hairline crack we never noticed

We had no idea our heat exchanger had a hairline crack until the technician found it with the combustion analyzer. Gas Services Edmonton explained the safety risk clearly and had it replaced within a few days. Glad we scheduled this when we did.

★★★★★

Thorough and honest, no pressure

The technician checked every component and gave us a clear written report at the end. No pressure to book repairs on the spot, just honest findings we could act on when we were ready.

★★★★☆

Good inspection, took a bit longer than expected

Our furnace is older with some accessibility issues in the mechanical room, so the inspection took closer to two hours instead of the estimated one. Worth it though, since they found a venting issue we had no idea about.

★★★★★

Explained everything clearly as he went

The Gas Services Edmonton technician walked us through what he was checking and why at each component, which made the whole process feel transparent instead of a black box. We understood exactly what was found and what our options were.

★★★★★

Scheduled before winter and glad we did

We wanted a clean inspection report before the cold months hit and this delivered exactly that. Professional, quick, and Gas Services Edmonton gave us confidence going into the season.

★★★★★

Found a combustion issue nobody mentioned before

We had two other companies do quick maintenance visits in past years and neither caught the combustion imbalance this technician found. Genuinely felt like a much more thorough process.

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