Tankless Water Heater Repair for Reno & Las Vegas Homes

Common Tankless Water Heater Problems We Repair

No matter the issue, our licensed technicians can diagnose and repair your tankless water heater fast and get your hot water flowing again. Our team handles a wide variety of common problems, including mineral buildup and ignition failure, such as:

• No hot water or inconsistent temperature, often from a failing flow sensor or heating element
• Water leaks or water pooling around the unit
• Error codes and system malfunctions
• Strange noises during operation, usually a sign of scale buildup in the heat exchanger
• Low water pressure or poor flow
• Electrical or gas connection issues

Benefits of a Well-Maintained Tankless Water Heater

A tankless water heater has real advantages over a traditional tank unit, but only when it’s properly installed and kept up with proper maintenance.

Energy Efficiency and Lower Bills

A tankless system is a more energy-efficient water heating option because it heats water only when you need it instead of keeping a full tank hot around the clock, which helps lower energy bills over time. Homeowners upgrading from an older tank unit may also qualify for rebates.

Space Savings

Without a bulky storage tank, a tankless water heater takes up a fraction of the space of a traditional unit, freeing up room in a garage, closet, or utility area.

Long-Term Reliability

Proper installation and regular maintenance help extend the unit’s lifespan and provide years of reliable performance from a tankless system, while a rushed or incorrect install is one of the most common reasons a unit needs repairs sooner than its expected service life should allow.

What Causes Tankless Water Heater Problems

Tankless systems are reliable, but a handful of issues account for most of the repair calls we get.

Flame Failure and Ignition Issues

A blocked gas supply or a dirty flame sensor can cause flame failure on gas units, leaving you without hot water until the issue is cleared and the sensor is cleaned or replaced.

Error Codes and Flashing Status Lights

A flashing status light or an error code on the display usually points to a power issue, an empty tank on the cold water supply side, or a specific fault the unit is designed to flag. Our technicians read these codes to diagnose the exact problem quickly.

Scale and Mineral Buildup

Descaling the heat exchanger is one of the most common repairs we perform, especially given how hard the water is throughout Reno and Las Vegas. Mineral buildup inside the heat exchanger can reduce efficiency and cause popping or rumbling sounds, and rust-colored water can point to mineral buildup or corrosion inside the unit.

Low Water Pressure and Flow Sensor Issues

Low water pressure often results from a blocked shutoff valve or a clogged inlet water filter, and issues with the inlet line or nearby pipes can also reduce flow. Cleaning the inlet filter is a simple fix that helps maintain water pressure and prevent clogs elsewhere in the system.

Venting and Airflow Problems

Tankless water heaters require proper airflow and venting for safe operation. Periodically inspecting the venting and air supply helps avoid blockages that can affect performance or trigger a safety shutoff.

Tankless Water Heater Repair vs. Replacement

Our licensed technicians can provide an honest evaluation of your tankless water heater and guide you toward the most cost-effective solution. Deciding whether to repair or replace your tankless water heater depends on its age, condition, performance, and repair cost, since comparing those factors with the unit’s remaining years often shows which option makes more sense.

Repair if:

• Your unit is less than 10 years old
• The problem is minor, like clogged filters, error codes, or ignition issues

Replacement if:

• Your unit is over 12 to 15 years old
• Repairs are frequent or costly
• You want a newer, more energy-efficient model

If you decide tankless water heater replacement is the better long-term value, we also offer tankless water heater installation, and replacing an older unit may also mean choosing a new water heater for better efficiency.

Our Tankless Water Heater Repair Process

Diagnosis

We start by identifying the root cause of the problem rather than just treating the symptom, checking error codes, water pressure, venting, and the heat exchanger to determine exactly what’s going on.

Repair

Once we know the cause, a licensed plumber completes the repair using quality parts suited to your unit’s make and model, whether that’s a new flow sensor, a cleaned or replaced flame sensor, or a full descaling of the heat exchanger. For more complex tankless issues, we provide professional repair to restore safe, reliable operation.

Testing

Before we consider the job done, we test the system to confirm consistent hot water, proper ignition, and correct water pressure, so you’re not left wondering if the fix will hold.

Tankless Water Heater Maintenance

Reno and Las Vegas both have hard water, which makes routine maintenance especially important for tankless systems and can help extend the unit’s service life.

We generally recommend flushing a tankless water heater every six to twelve months, more often in areas with harder water, to clear mineral buildup from the heat exchanger before it affects performance.

Regular maintenance also includes cleaning the inlet water filter and inspecting venting and airflow, both of which help prevent the most common issues before they turn into a repair call. Ask about adding tankless water heater maintenance services to your maintenance plan for ongoing upkeep.

Tankless Water Heater Installation

Upgrading to a tankless water heater requires professional installation to ensure the system operates efficiently and safely from day one. A tankless unit involves more specialized setup than a traditional tank, since gas line sizing, venting, and electrical requirements all need to be matched correctly to the specific model for it to perform as intended.

What’s Involved in the Installation Process

Our licensed plumbers handle the entire installation process, including connecting the gas line or electricity supply, setting up the unit, and ensuring proper venting and airflow. We also confirm your home’s existing gas line or electrical capacity can support the new unit before installation begins, since undersized gas lines are one of the most common causes of poor performance or ignition issues in a newly installed tankless system.

Why Proper Installation Matters Long-Term

Proper installation is critical for maximizing the energy efficiency and longevity of your new tankless water heater. A rushed or incorrect install is one of the most common reasons a unit needs repairs earlier than its expected service life should allow, which is why we take the time to size and connect the system correctly rather than treating installation as a quick swap.

Choosing Between Tank and Tankless

If you’re deciding whether to switch from a traditional tank system to tankless, our technicians can walk you through the tradeoffs based on your household’s hot water usage, available space, and budget. For homeowners who decide tankless isn’t the right fit, we also provide standard water heater installation services.

Recirculating Pump for Tankless Water Heaters

A recirculating pump can be installed alongside your tankless water heater to provide hot water more quickly and efficiently throughout your home, solving one of the more common frustrations homeowners run into after switching to tankless.

How a Recirculating Pump Works

This pump helps circulate hot water through the pipes so that it’s available almost instantly at fixtures, rather than requiring you to run the tap for a stretch while cold water clears out of the line first. This reduces water waste and improves convenience, particularly in larger homes where fixtures may sit far from the water heater itself.

Who Benefits Most

A recirculating pump is especially useful for homes with multiple bathrooms, longer pipe runs between the water heater and fixtures, or households where waiting for hot water is a frequent annoyance. It’s a smaller add-on to the overall system, but one that can meaningfully change the day-to-day experience of using hot water in the home.

Adding One to an Existing System

Installing a recirculating pump is an excellent option for most homeowners looking to optimize their hot water delivery and enhance overall system performance, whether it’s added during initial tankless water heater installation or retrofitted onto a system you already have. Our technicians can evaluate your existing setup and let you know whether a recirculating pump makes sense for your home’s layout.

Why Choose Hawthorne for Tankless Water Heater Repair

Our licensed technicians provide expert plumbing services for diagnosing and repairing all major brands and models of tankless water heaters, backed by an A+ Better Business Bureau rating and upfront pricing with no hidden fees. We offer 24/7 emergency service for the times a tankless water heater fails at the worst possible moment and your hot water is on the line, and we’ll always give you an honest recommendation on repair versus replacement rather than pushing a new installation you don’t need.

Serving Reno, Las Vegas, and Surrounding Areas

We provide tankless water heater repair throughout:

• Reno, Sparks, Carson City, and the surrounding Northern Nevada area
• Las Vegas, Henderson, and Southern Nevada communities