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We have diagnosed every fault a gas pool heater can develop. Here are the issues our clients call us about most often.

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Pool Heater Won't Start at All

The most common cause is a failed igniter, a cracked pilot assembly, or an electronic ignition lockout triggered by repeated failed startup attempts. Running through failed cycles without resolving the fault puts additional stress on the gas valve and control board. We test the full ignition sequence and replace the specific component responsible for the startup failure.

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Pool Heater Shuts Off Before Reaching Temperature

A thermocouple or thermopile that has weakened with age will signal the gas valve to close before the pool water reaches the set temperature. This is the most frequently misdiagnosed pool heater fault because the symptoms resemble a gas supply problem. We test sensor output voltage and replace the component when readings fall below the minimum threshold for safe operation.

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Pool Heater Running But Water Stays Cold

A heater that completes its cycle but fails to raise the water temperature usually has a heat exchanger problem, a gas pressure restriction, or a flow rate issue through the unit. Continuing to run the heater in this condition accelerates heat exchanger damage and increases repair costs. We test flow rates, combustion output, and heat exchanger condition to find the specific cause.

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Same Error Code Keeps Coming Back

Control board lockouts that reset but keep returning almost always point to an underlying mechanical or venting fault rather than a board failure. Common triggers include a marginal pressure switch, a restricted vent, or an ignition component failing intermittently under normal operating conditions. We diagnose the triggering fault rather than defaulting to an expensive control board replacement.

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Unusual Sounds During Pool Heater Operation

Clicking, rumbling, or irregular flame sounds from the burner area during startup typically indicate an ignition timing problem, a dirty burner surface, or a gas pressure fluctuation affecting combustion quality. These sounds are not just a nuisance and should not be ignored. We inspect the burner assembly and ignition system to identify and address the source.

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Gas Smell Near the Pool Heater

A gas odour anywhere near the pool heater or supply connections indicates a leak that requires immediate attention from a licensed gas technician. Do not run the heater or operate any electrical switches in the space. We locate the source of the leak, address the connection or component responsible, and verify the repair with proper pressure testing equipment.

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Corrosion on Pool Heater Burner or Venting

Corrosion on the burner surface, heat exchanger, or venting connections is caused by exposure to pool chemical vapours, condensation, and repeated high-heat cycling over time. Left unaddressed, corrosion compromises combustion efficiency and can lead to carbon monoxide concerns inside the pool room. We assess the extent of the damage and complete the appropriate repair or component replacement.

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Pool Heater Pressure Switch or Venting Problem

A pressure switch that reads inadequate venting pressure will lock the heater out as a safety measure, often mimicking a board or wiring fault. The actual cause is usually a blocked vent path, a dirty pressure port, or a switch that has drifted out of calibration with age. We test venting pressure directly and confirm whether the switch or the venting run is the root source of the problem.

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Pool Heater Won't Start After Winter

A heater that shut down normally in the fall but will not restart in spring has often been affected by freeze damage, condensation reaching electrical connections, or a control board that failed during storage. This is one of the most common calls we receive at the start of indoor pool season. We inspect the full system at startup, identify what failed over winter, and get the heater running before the season is underway.

Reviews

What Our Customers Say

★★★★★

Finally got an itemized quote

Every other company gave us a vague flat number over the phone. Gas Services Edmonton broke down exactly what part was failing and what it would cost before touching anything. Refreshing to see actual transparency.

★★★★★

Diagnostic fee applied like they promised

They were upfront that the diagnostic fee would count toward the repair if we moved forward, and that is exactly what happened on the final invoice. No surprises, no hidden charges tacked on at the end.

★★★★☆

Fair price, older model needed a special part

Our heater is older so the replacement part had to be ordered in, which pushed the total slightly past the initial estimate. They explained why clearly beforehand though, so it wasn't really a surprise.

★★★★★

Explained repair versus replace math clearly

Our heater is 12 years old and the technician walked us through why the heat exchanger repair cost almost as much as a new unit would. Gas Services Edmonton let us decide without any pressure either way.

★★★★★

Booked ahead of the season and it paid off

We called before peak season started based on their advice and got a same-day appointment with no rush pricing. Smart to plan ahead based on what they told us about seasonal demand.

★★★★★

No pressure, no upselling

The technician recommended the cheaper sensor replacement instead of a full control board swap once he confirmed what was actually wrong. Gas Services Edmonton could have charged more and we would not have known better.

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From gas furnaces and fireplaces to pool heaters and tankless water heaters, our certified technicians keep your home safe, warm, and running right.

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