The system can't keep up with demand anymore
Likely cause: Sediment buildup reducing burner or element efficiency, a failing thermostat, or demand that's simply outgrown the system's original recovery rate as the business or building has grown.
Our fix: We test the actual recovery rate against the unit's rated capacity and inspect for buildup, then recommend repair or resizing based on what we find.
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One tank in a multi-tank rack has failed
Likely cause: In a rack system, individual tanks can fail independently from a bad element, thermostat, or gas valve, without taking down the whole system if it's set up and isolated correctly.
Our fix: We isolate the failed unit, test it directly, and repair or replace that single tank so the rest of the system keeps supplying hot water during the repair.
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Temperature drops during peak usage hours
Likely cause: Recovery time not keeping pace with simultaneous draw, often from sediment reducing heat transfer efficiency or a system that was undersized for current peak demand.
Our fix: We flush sediment where that's the cause, and if the system is genuinely undersized, we'll walk you through what a properly sized replacement looks like.
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There's a leak at the base or fittings
Likely cause: Could be a loose drain valve, a failed pressure-relief valve, or fitting corrosion, all repairable. A leak from the tank body itself usually means the tank has reached the end of its service life.
Our fix: We isolate the source right away, and if it's the tank itself, we treat it as urgent and walk you through replacement options fast.
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The pilot or ignition system keeps failing
Likely cause: A worn thermocouple or ignition control, a venting draft issue, or gas supply pressure that's inconsistent under the system's higher demand.
Our fix: We test the gas supply, venting, and ignition components together, since commercial burners are more sensitive to supply issues than a standard residential unit.
See gas repair details →