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Gas pool heaters fail in predictable ways. Here are the problems our clients call us about most often, and what we do to fix them.

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Pool Heater Pilot Won't Stay Lit

A pilot that lights briefly and then goes out almost always points to a worn thermocouple or thermopile that can no longer hold the gas valve open. Continuing to relight without replacing the failed sensor is a short-term workaround that will not last. We test and replace the specific sensor responsible so the pilot holds reliably on the first attempt.

⏱️

Pool Heater Starts Then Shuts Off Quickly

Short cycling is usually caused by a tripped pressure switch, a flow switch fault from low water circulation, or a heat exchanger that is beginning to overheat due to scaling. Each of these causes the unit to shut itself down as a safety measure. We test each component in sequence to confirm the source before any part is replaced.

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Pool Not Heating Even Though Heater Runs

When the burner fires but the water temperature stays flat, the heat exchanger is often the issue. Calcium buildup on the heat exchanger surface reduces heat transfer efficiency significantly, especially in properties with hard water. We inspect the exchanger and advise on whether cleaning or replacement is the more practical solution.

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Pool Heater Pressure Switch Keeps Tripping

A pressure switch that trips repeatedly usually indicates a water flow problem, a clogged filter basket, or an air pressure tube that has cracked or disconnected. The switch itself is rarely the root cause, and replacing it without diagnosing the upstream issue will not solve the problem. We trace the fault back to the correct source before recommending a fix.

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Pool Heater Gas Valve Not Opening

A gas valve that has seized, partially failed, or is receiving incorrect voltage from the control board will prevent the burner from receiving enough fuel to maintain combustion. This type of fault requires a licensed gas technician to diagnose safely. We test the valve, control signal, and supply pressure before confirming whether the valve needs replacement.

Pool Heater Igniter Clicks But Won't Light

An electronic igniter that cycles without producing a flame often points to a fouled or cracked igniter tip, a misaligned electrode, or a gas supply pressure issue preventing the fuel from reaching the ignition point. We check the electrode gap, igniter condition, and gas pressure in order, then repair or replace the specific component that is preventing ignition.

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Error Code Showing on Pool Heater

Modern gas pool heaters display error codes when a sensor, switch, or control board detects a fault. These codes narrow down the problem area but still require a technician to confirm the diagnosis with physical testing. We interpret the code, verify the related component, and carry out the correct repair rather than resetting the unit and hoping the fault clears on its own.

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Pool Heater Tripping the Breaker

A breaker that trips each time the pool heater runs usually points to an electrical fault inside the unit: a shorted element, degraded wiring insulation, or a control board drawing excess current. Resetting the breaker repeatedly without addressing the cause creates a risk near water. We test the electrical path under load and make the correct repair before returning the system to service.

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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 to internal components, condensation reaching electrical connections over winter, or a control board that failed during storage. This is one of the most common calls we receive at the start of 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

★★★★★

Saved our long weekend with family visiting

Our heater died the Friday before a holiday weekend with relatives coming from out of town. Gas Services Edmonton had someone out within a few hours and the pool was warm again by dinner. Cannot thank them enough for the quick turnaround.

★★★★★

Correctly diagnosed a tricky heat pump issue

Our heat pump was running nonstop but the water stayed cold. The technician traced it to a refrigerant leak rather than just replacing parts randomly like a previous company had tried. Fixed properly this time.

★★★★☆

Great fix, part took a day to arrive

The technician found a cracked igniter quickly but the exact replacement had to be ordered overnight. We lost one day of pool use but the communication throughout was excellent and the fix has held up perfectly since.

★★★★★

Honest about replacing versus repairing

Our heater is almost ten years old and Gas Services Edmonton was upfront that repairing the failed heat exchanger would cost more than half of a new unit. Appreciated the honest advice instead of an unnecessary repair push.

★★★★★

Caught a gas valve issue before it got worse

I noticed a faint smell near the heater and called immediately. The technician found a gas valve that was not sealing properly and fixed it same day. Relieved we caught it before it became a bigger safety problem.

★★★★★

Quick response on a busy summer weekend

Called on a Saturday during peak pool season expecting a long wait, but Gas Services Edmonton had a technician at our house within a couple hours. Straightforward pricing and the heater has run perfectly since the repair.

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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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