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We have serviced hundreds of tankless units across the area. These are the issues our clients call about most often.

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Tankless Heater Not Heating as Well Anymore

Mineral deposits accumulate on the heat exchanger coil over time, insulating it and forcing the system to burn more gas for the same output. Left untreated, severe scale can crack the exchanger entirely. We perform a complete descaling flush to restore full heat transfer efficiency.

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Tankless Heater Inlet Filter Blocked

The inlet filter traps sediment before it enters the heat exchanger, but it needs regular cleaning to do its job. A blocked filter restricts water flow, causing reduced output pressure and triggering flow-related error codes. We clean and inspect the filter on every maintenance visit.

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Tankless Heater Recurring Error Codes

Error codes that keep returning after a reset usually point to an underlying issue: a dirty heat exchanger, a failing sensor, or a combustion problem the system has flagged. We pull the error history, diagnose the root cause, and clear the issue rather than just resetting the display.

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Tankless Heater Fluctuating Hot Water Temperature

Water that runs warm, drops cold, and takes time to recover is usually a sign of a dirty flow sensor or significant scale buildup affecting the heat exchanger response. Ignoring it puts extra strain on the burner system. We clean the sensor, flush the exchanger, and restore consistent temperature delivery.

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Tankless Heater Venting Blocked or Corroded

Blocked or corroded venting causes incomplete combustion, which reduces efficiency, raises carbon monoxide risk, and can trigger automatic unit shutdowns. We inspect the full vent path for blockages, corrosion, and loose connections and correct any issues found during the visit.

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Tankless Heater Pressure Relief Valve Leaking

A pressure relief valve that leaks, sticks open, or does not release under pressure is both an efficiency problem and a safety risk. We test the valve function on every maintenance visit and replace it if it no longer operates within safe parameters.

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Tankless Heater Ignition or Flame Sensor Failing

A unit that fails to ignite consistently or shuts off mid-cycle often has a dirty or worn flame sensor, a faulty igniter, or a gas pressure issue. These components directly affect whether your unit starts and stays running safely. We test ignition and burner performance as part of every standard maintenance visit.

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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 maintenance 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

★★★★★

Simple annual habit that pays off

We started scheduling annual descaling after our neighbor's unit failed from years of neglect. Gas Services Edmonton is quick, thorough, and always explains what they found. Cheap insurance for a system this important.

★★★★★

Caught a small issue before it became a big one

During our routine visit the technician noticed a flame sensor starting to wear and flagged it for us. We got it replaced before it caused an actual breakdown. Glad we stay on a maintenance schedule.

★★★★☆

Good visit, took a bit longer than expected

Our unit had gone almost two years without descaling so the visit ran longer than the usual hour. The technician explained why upfront and the unit runs noticeably better since. Worth it despite the extra time.

★★★★★

Kept our warranty valid

We had no idea our manufacturer required documented annual maintenance to keep the heat exchanger warranty active. Gas Services Edmonton provides a service record every visit, which turned out to matter more than we expected.

★★★★★

Honest about our hard water situation

The technician explained our well water was causing faster scale buildup than average and recommended a shorter interval between visits. Appreciated the straightforward advice instead of a generic one-size answer.

★★★★★

Same unit running strong after five years

We have had the same tankless unit serviced every year since installation and it still runs like new. Gas Services Edmonton has been consistent and thorough every single visit.

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