Tankless Water Heater Repair in Hickory, NC
An error code flashing on the display, water that cuts from hot to cold mid-shower, or a unit that won't fire up at all are common tankless-specific problems, and each one points to a different cause than what you'd see with a tank. A&B Plumbing provides tankless water heater repair in Hickory, NC for homeowners and businesses, diagnosing what a tankless unit is actually telling you before recommending a fix.
Signs Your Tankless Water Heater Needs Repairs
Tankless units fail differently than tank systems. Watch for:
An error code displayed on the unit's control panel
Hot water that cuts in and out, sometimes called the cold water sandwich effect
The unit not igniting or firing up when hot water is requested
Reduced hot water flow even though the unit is running
Reduced hot water flow even though the unit is running
Each of these narrows down to a specific component, and we test for the actual cause rather than replacing parts on a hunch.
Water Heater Services
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Tankless Gas Water Heater Repair
Tankless gas water heater repair often comes down to the ignition system, gas valve, venting, or the condensate drain on condensing units. A&B Plumbing is a certified Navien Tankless dealer and service center and stocks parts for the Navien units we service, which covers the majority of gas tankless repairs we're called out for in the Hickory area.
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Tankless Hot Water Heater Repair
Tankless hot water heater repair isn't limited to gas units. A&B Plumbing also services electric tankless systems, and our plumbers diagnose the specific failure, whether that's a heating element, flow sensor, control board, or ignition component, before recommending a repair.
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Tankless Water Heater Maintenance
Mineral scale building up on the heat exchanger is one of the most common reasons a tankless unit loses performance or throws error codes over time, particularly in areas with harder water. Regular descaling and filter maintenance keeps a tankless unit running at the efficiency it was installed with and helps avoid premature repairs. A&B Plumbing offers tankless water heater maintenance, and customers in our maintenance and membership program receive discounted service.
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Tankless Hot Water Repair When the Unit Won't Fire
When a tankless unit produces no hot water at all, the cause is usually different than with a tank. It can point to insufficient gas supply, a flow rate that isn't triggering the unit to ignite, a failed ignitor, or a safety shutoff that's tripped. We check these in order rather than guessing.
A&B Plumbing's Tankless Repair Credentials
Homeowners throughout Hickory choose A&B Plumbing for:
Most Asked Tankless Repair Questions
Error codes correspond to specific faults, such as ignition failure, flow issues, or an overheat condition, and the exact code narrows down what's wrong before a technician even arrives. We ask for the code when you call so we can come prepared.
That's commonly called the cold water sandwich effect, where cold water sitting in the line between the unit and the fixture reaches the tap before the newly heated water catches up. It's more noticeable on some plumbing layouts than others and isn't always a sign of a failing unit.
Mineral scale from hard water can build up on the heat exchanger over time, reducing efficiency and eventually triggering error codes or reduced flow. Regular descaling maintenance is the main way to prevent this kind of damage.
Most tankless failures, including ignition components, flow sensors, and control boards, are repairable. Replacement typically only comes up if the heat exchanger itself has failed or the unit is significantly out of date on parts availability.
Contact A&B Plumbing About Your Tankless Repair
If your tankless water heater is showing an error code, cutting out, or not producing hot water at all, call A&B Plumbing. We'll identify what the unit is actually telling you before recommending any repair.
