Tankless Water Heater Repair for Falls Church Homes & Businesses

When your tankless water heater stops delivering, every shower, load of dishes, and sink of laundry is a reminder it isn’t working. At Richards Heating & Air Conditioning Co., Inc., we’ve been restoring comfort for Falls Church homeowners since 1959, and our NATE Certified technicians bring that same depth of knowledge to every tankless water heater repair. Carrier Factory Authorized Dealer status reflects the standard we hold ourselves to across every comfort system we service.

The Richards Creed says a job isn’t done until both you and your customer are completely satisfied. That’s not a slogan. It’s how we’ve operated for over six decades, and it’s the standard every technician on our team works by.

If your tankless water heater is throwing error codes, running cold, or failing to fire at all, call us at (703) 844-3822 or reach out online. We can diagnose the problem and give you a clear path forward.

Common Tankless Water Heater Problems We Diagnose & Repair

Tankless units fail differently than tank-style heaters. The on-demand design means faults often show up as the unit firing briefly and then shutting off, temperatures that swing mid-use, or a display flashing an error code you can’t decode. Our technicians are trained to work through these systems methodically rather than guessing.

Heat Exchanger Scale, Sensors & Ignition Issues

We identify and repair the failure points specific to tankless technology, including heat exchanger scale buildup, flow sensor faults, ignition problems, and related error codes.

• Heat exchanger scale buildup: Hard water mineral deposits accumulate on the heat exchanger over time, reducing efficiency and eventually triggering shutdowns. Northern Virginia water trends toward hardness, making this one of the most frequent causes of reduced output we see in the Falls Church area.
• Flow sensor faults: A faulty flow sensor can prevent the unit from activating even when the tap is fully open. Diagnostics confirm whether the sensor needs cleaning or replacement.
• Ignition system failure: Gas models that click repeatedly without firing typically have an ignition or flame sensor fault. We trace the signal path to isolate the cause.

Venting, Gas Flow & Temperature Problems

• Gas valve and venting issues: Improper or blocked venting on gas models isn’t just a performance concern. We inspect combustion and venting as part of any gas tankless water heater repair.
• Temperature inconsistency: Fluctuating output often points to a failing thermistor, a partially blocked heat exchanger, or an undersized flow rate for the demand placed on the unit.

We service both gas and electric tankless models. The Richards Creed calls on us to stay current on the latest equipment each year, and that’s how we approach tankless systems just as we do every other comfort technology we work on.

Repair or Replace? We Give You an Honest Answer

Replacing a system before it’s necessary is an unnecessary expense. Repairing one that’s past its useful life costs you twice. Before we recommend anything, we run diagnostic testing to understand exactly what’s wrong and what the unit’s overall condition looks like.

Tankless water heaters can last 15 to 20 years with proper maintenance, which makes age a key part of the calculation. A younger unit with an isolated ignition fault or a failed flow sensor is usually a strong repair candidate. An older unit with recurring failures, a cracked heat exchanger, or discontinued parts is a different conversation. We also factor in parts availability for your specific brand and model.

The Richards Creed is direct on this: use quality materials and workmanship, because shortcuts lead to shortcomings. That principle cuts against steering you toward a replacement you don’t need or a patch repair that may not hold. We can tell you what we found, what your options are, and what we’d do if it were our home.

Why Falls Church Residents Call Richards Heating & Air Conditioning Co., Inc. for Tankless Repairs

There’s no shortage of plumbers and HVAC companies serving Northern Virginia, but few bring the combination of local history, certifications, and a stated operating standard that Richards does. We’ve served Falls Church since 1959. It’s a track record that outlasts most competitors in this market.

• NATE Certified technicians: National certification in HVAC and comfort conditioning systems across the team
• Carrier Factory Authorized Dealer: Recognized for technical standards and customer service by a leading industry manufacturer
• Best of Arlington 2025 and Best Home Experts 2024: Third-party recognition from local and national platforms
• Nextdoor Neighborhood Favorite and Angi Certified: Consistent reputation in the communities we serve
• ACCA member: Active participation in the national trade association for our industry
• $3,000,000+ in insurance coverage: Full protection for your home and our team on every job
• Clean jobsite standard: We leave your home the way we found it when the job is complete
• Flexible Financing Available: Options to help manage the cost of repairs or replacement when needed

We provide tankless water heater repair in Falls Church and the surrounding communities, including Fairfax, Idylwood, McLean, Reston, and locations across Northern Virginia and Maryland. To schedule water heater services in Falls Church, call (703) 844-3822 or contact us online.