Professional Tankless Water Heater Repair in Columbia, SC and Augusta, GA

No hot water, changing water temperatures, or an error code on the display means your tankless system needs attention. Cassell Brothers provides tankless water heater repair in Columbia, SC, Augusta, GA, and surrounding communities. Our licensed plumbers diagnose the problem and explain what needs to be repaired.

Problems with a traditional tank system? Our water heater repair service covers conventional water heaters.

Common Tankless Water Heater Problems We Repair

Tankless systems develop specific problems that affect hot water temperature, flow, and operation. Here are four common reasons to schedule repair.

No Hot Water or an Error Code on the Display

An error code means the system has detected a problem and may shut down to protect the equipment. The cause can involve ignition, airflow, venting, electrical components, or another part of the system. A plumber can test the unit and identify the failure.

Ignition or Flame Failure

If the unit clicks but does not produce hot water, the burner may not be lighting correctly. Gas supply, ignition components, venting, or flame sensors can cause the problem. Gas-related repairs require professional diagnosis.

Cold Water Sandwich and Temperature Swings

Hot water that suddenly turns cold and then warms again points to a flow or operating problem. The cause can include changing demand, flow restrictions, system settings, or equipment issues. Testing shows why the unit is not maintaining a steady temperature.

Reduced Flow Rate or Scale Buildup

A drop in hot water flow can come from buildup inside the unit or another restriction in the system. Scale can reduce water flow through the heat exchanger and affect heating. A tankless water heater flush may be part of the repair when buildup is present.

Signs Your Tankless Unit Needs Repair Now

Schedule tankless water heater repair when you notice:

• Recurring error codes

• Rumbling or clicking during ignition

• Water that changes from hot to cold

• Shutdowns during heavy hot water use

• Reduced hot water flow

• Rising gas or electric bills

• Visible corrosion

• Water leaking from the unit

If you smell gas or see an active leak, shut the system down and call for service immediately.

Repair or Replace Your System: Which Makes Sense

Repair makes sense when the unit is in serviceable condition and fixing the failed component restores normal hot water. Age, repair history, current repair needs, warranty coverage, and system sizing all factor into the decision.

Repeated failures or major component damage can signal replacement is approaching. Cassell Brothers can explain your options based on the condition of the unit rather than pushing replacement when a repair makes sense.

When replacement is the better option, explore our tankless water heaters page for information about new systems and installation.

Why Midlands and CSRA Homeowners Choose Cassell Brothers

Cassell Brothers is locally owned and brings decades of plumbing experience to tankless repair. Our licensed and insured plumbers are background checked and arrive in stocked service vehicles. We provide upfront pricing and back our work with a workmanship guarantee.

Tankless systems require different diagnostics than conventional water heaters. Our plumbers check the equipment, controls, venting, fuel or electrical connections, and water flow to find the problem before starting the repair.

Serving Columbia, Augusta, and the Surrounding Areas

In the Midlands, Cassell Brothers serves Columbia, Irmo, Lexington, West Columbia, Cayce, Chapin, Blythewood, and Forest Acres. Homes around Lake Murray and established Columbia neighborhoods include a mix of original tankless installations and retrofits. Our plumbers in Columbia, SC work on both.

Across the CSRA, we serve Augusta, Martinez, Evans, Grovetown, Hephzibah, and North Augusta on the South Carolina side of the Savannah River. Our plumbers in Augusta, GA repair tankless systems throughout the Augusta-area service territory.

Cold snaps in January and February can expose problems that were less noticeable during mild weather. Colder incoming water requires the unit to work harder to deliver hot water at the set temperature, making reduced flow or an aging system easier to notice.

Schedule Your Tankless Water Heater Repair

If your tankless unit has stopped heating, displays an error code, leaks, or cannot maintain hot water, schedule service with Cassell Brothers. We provide tankless repair throughout Columbia, Augusta, and surrounding Midlands and CSRA communities.

For help with other pipes, fixtures, drains, or water heater problems, explore our plumbing services or schedule your repair today.