Tankless Water Heater Repair in Arlington

- Expert Repairs on All Tankless Units
Continuous flow, on-demand and hybrid water heater service
- Lasting Restoration of Hot Water Delivery
Get back to clean, on-demand hot water ASAP
- Trusted Techs + a Workmanship Warranty
Certified work plus a warranty on parts and labor
- Get Same Day Service!
- Family Owned and Operated
- Fix Your Issue 100% Guaranteed

Tankless Water Heater Repair, On Your Terms
Arlington deserves better Tankless Water Heater Repair solutions
Your tankless water heater isn’t delivering hot water on-demand like you expect. Whether it’s cold bursts of shower water or unexpectedly high energy bills, you need expert repairs done by plumbers who actually know how to service these complex systems.
At Mother, we're more than licensed plumbers—we’re a modern plumbing service built on thoughtful customer care and tech-driven solutions. We're transforming how Arlington homeowners experience tankless water heater repair.
Need tankless service? Call us 24/7 for priority scheduling and the first available appointment.
Mother’s Arlington Tankless Water Heater Repair Advantage
Our Master Plumbers built our repair service to fix problems quickly and solve issues permanently—the same kind of service we’d give our own mothers.
- Your Concern: I'm worried about getting a general "water heater guy."
- Our Solution. Certified Tankless Expertise. We're not just "water heater guys." We have deep training and hundreds of tankless repair jobs under our belts. We know how to service any problem in every major brand of on-demand water heater.
- Your Concern: I need assurance the repair will last.
- Our Solution. Added Warranty Protection. We back our work with a powerful 12-year warranty on parts and labor. Your hot water confidence is guaranteed for the long term.
- Your Concern: I don't want to wait all day for service.
- Our Solution. Same-Day Service & Full Transparency. Our trucks are fully stocked, meaning almost every job is done on the same day. You'll also know exactly when your plumber is coming, what they look like, and their qualifications ahead of time.
- Your Concern: I'm worried about cost surprises.
- Our Solution. Fixed Quote Certainty. After an expert inspection, you’ll receive a fixed quote. The price is final—no hidden fees, no surprises.
- Your Concern: I need a professional who respects my home.
- Our Solution. Clean and Caring Service. We bring the boot covers, drop cloths, and clean service, followed by even better cleanup.
Tankless Water Heater Brands We Service
Mother services and repairs all major brands of on-demand water heaters—gas, electric, propane, plus hybrid and combination systems.
- Rinnai
- Rheem
- A.O. Smith (and State Water Heaters)
- Navien
- Kenmore
- Bosch, and more
High tech service. Even higher standards. Say hello to Mother Modern Plumbing.

Fast Tankless Water Heater Repair: within 24 hours
A malfunctioning tankless water heater in Arlington, TX can disrupt your home’s daily routine. Our team provides fast, expert Tankless Water Heater Repair to restore reliable hot water. We also offer Tankless Descale to prevent hard water buildup that can damage your system over time.
Common signs you need tankless repairs
Our technicians encounter more and more on-demand, tankless hot water heater systems in local homes. Here are the 6 most common reasons Arlington residents call us for repairs:
- Persistent error codes
- No hot water (or reduced hot water flow)
- "Cold water sandwich" (bursts of cold water between hot water)
- Inefficient heat pump operation
- Tankless system won't ignite
- Technical control board issues
From heat exchanger replacement to thermostat repair, T&P valve service to flow sensor repairs, Mother gets the job done right the first time.
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Proudly helping with Tankless Water Heater Repair in Arlington
What are the most common tankless water heater repair types?
A majority of tankless water heater repairs (especially in DFW) involve one of these six key issues:
- Descaling due to mineral buildup
- Ignition system issues (blocked sensors)
- Blockages of vents
- Faulty flow sensors
- Leaks from a damaged heat exchanger or valves
- Damaged gas flexes and closed valves (gas units)
How often should I descale my tankless water heater?
Perform tankless water heater descaling once every 6-12 months in most areas to eliminate mineral buildup in the system.
If you live in areas with extremely hard water- such as Dallas-Fort Worth- consider decaling your on-demand hot water heater every 6-8 months (roughly twice a year). Limescale is particularly hard on tankless units in our area.
How often should I replace the inlet filter on a tankless water heater?
This depends on the water quality in your area and your personal water usage rate. Most homeowners should replace the inlet filter every 6 months.
If your home uses a lot of water, or if you live in regions with extremely hard water (like North Texas), check your inlet filter every 4 months. Increased use and excessive mineral scaling have significant impact on the filter's lifespan.









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