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Annual service catches these problems before they become repairs. Here is what we find most often during service visits.

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Tankless Heater Scale Reducing Output

Mineral deposits accumulate on the heat exchanger coil with every heating cycle, gradually reducing efficiency and raising operating temperatures. Over time the buildup can crack the exchanger entirely, which is an expensive replacement. We perform a full descaling flush on every service visit to clear deposits before they cause structural damage.

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Tankless Heater Inlet Filter Blocked

The inlet filter catches sediment before it reaches the heat exchanger, but it needs periodic cleaning to maintain proper water flow. A blocked filter reduces output pressure, can trigger flow-related shutdowns, and puts unnecessary strain on the pump. We clean and inspect the filter as a standard part of every service appointment.

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Tankless Heater Venting Blocked or Loose

A blocked or disconnected vent prevents proper combustion air flow, causing incomplete burning, elevated carbon monoxide risk, and automatic unit shutdowns. Venting issues can develop gradually without obvious signs inside the home. We inspect the full vent path on every service visit and correct any blockage, corrosion, or connection issue found.

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Tankless Heater Ignition Becoming Unreliable

Ignition components and flame sensors can drift out of calibration over time, leading to slow starts, inconsistent ignition, or occasional mid-cycle shutdowns. These issues worsen progressively if not corrected during service. We test the full ignition cycle under operating conditions and service or replace components that are no longer performing to specification.

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Tankless Heater Pressure Relief Valve Worn

A pressure relief valve that sticks, drips, or fails to activate within the correct pressure range is both a performance issue and a safety concern. These valves wear gradually and are rarely noticed until they fail in a way that causes a problem. We test valve function on every service visit and replace it if it no longer meets safe operating standards.

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Tankless Heater Flow Sensor Reading Inaccurately

A flow sensor that reads incorrectly can cause the unit to fail to activate at low flow rates, deliver inconsistent temperature, or cycle on and off unexpectedly during use. Sensor accuracy degrades over time with sediment exposure. We clean, test, and verify the flow sensor calibration as part of every standard service visit.

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Tankless Heater Burning More Gas Than Usual

Gas combustion efficiency can drift as burner components age, venting becomes partially restricted, or the heat exchanger accumulates scale. The result is higher gas consumption for the same output. We verify combustion performance during every service visit and identify what is driving any efficiency losses found during testing.

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Tankless Heater Not Serviced in Over a Year

A tankless water heater that has gone more than a year without professional service may have heat exchanger scale, inlet filter buildup, and ignition component wear that compound quietly. The risk of a mid-season lockout or error code increases with each season skipped. We assess the full unit condition during a catch-up visit and address what needs correction.

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No Hot Water at All

A complete loss of hot water usually points to an ignition lockout, a tripped safety switch, or a gas supply interruption that has prevented the unit from firing. Forcing a reset without diagnosing the cause can allow the underlying fault to worsen. We identify the root cause and restore full operation safely.

Reviews

What Our Customers Say

★★★★★

Water heats up so much faster now

Our tankless unit had been taking longer and longer to give us hot water and I honestly thought it was just getting old. The technician from Gas Services Edmonton descaled it and explained the buildup he found. Huge difference within a day.

★★★★★

Caught a filter issue before it got worse

During the annual flush the technician noticed our water inlet filter was almost fully clogged, which we had no idea about. He cleaned it as part of the visit and walked us through why it matters. Appreciated the thoroughness.

★★★★☆

Good service, took a bit longer than expected

The descale itself went fine but our unit didn't have isolation valves installed yet, so the visit ran closer to two hours instead of one. The technician explained the extra step upfront so there were no surprises on the invoice.

★★★★★

Finally understand why our bills were climbing

Gas Services Edmonton found significant scale buildup in our heat exchanger and explained how that was quietly driving up our gas bill. After the flush our usage dropped noticeably. Wish we had booked this sooner.

★★★★★

Knew our brand inside and out

Our unit has a built-in recirculation pump and the technician knew exactly how to flush the loop separately from the main exchanger. Felt like he had serviced this exact model before, not guessing his way through it.

★★★★★

Signed up for the annual plan on the spot

After seeing how much scale had built up in just under two years, I asked about ongoing service. The technician from Gas Services Edmonton set us up on a yearly plan so we never have to remember to book it again.

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