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Tankless Water Heater Installation Repair Services Seattle, WA

Tankless Water Heaters

over 4454 reviews

Tankless Water Heater System Services in Seattle, WA

Are you looking for a new type of water heater? Call 206.792.7495 today for expert Seattle tankless water heater installation and repair and honest pricing. For many homeowners who try a tankless system, it’s the only way to go.

As the name suggests, tankless water heaters operate without a traditional hot water tank. There is no tank placed in your basement, because a heating element is connected directly to the plumbing system. When anyone in your household turns on a hot water faucet, you get hot water until you don’t need it anymore. Tankless systems are also called on demand water heaters because of this feature. The individual faucets receive the hot water when it’s needed, which makes for a much more enjoyable situation for people inside the house.

If you’re ready for instant hot water whenever you want it, Gene Johnson can help you set it up! Give us a call to speak with a knowledgeable member of our team about all the expert tankless water heater services we provide!

Our Tankless Water Heater Services for Seattle Homeowners

At Gene Johnson, we make sure Seattle homeowners always have hot water on demand. Whether you need a quick repair, a fresh installation, or a full system replacement, our experts are here to deliver dependable service.

Tankless Water Heater Repair

When your tankless system starts acting up, we’re ready to step in with reliable, fast repairs that keep your home comfortable.

Common tankless water heater issues we fix in Seattle, WA:

  • Fluctuating water temperatures caused by clogged filters or mineral buildup in the system.
  • Ignition problems that prevent your tankless heater from firing up when hot water is needed.
  • Burner or heating element malfunctions leading to lukewarm water during showers.
  • Blocked or dirty air supply vents reducing performance and efficiency.
  • Corroded or leaking water lines connected to the tankless unit.
  • Error codes displayed on the digital panel that indicate underlying mechanical issues.
  • Scale buildup inside the heat exchanger reducing water flow and heat transfer.
  • Gas or electrical connection problems preventing the system from operating correctly.

When you call us for tankless water heater repair, we respond quickly and provide clear solutions so you can get back to enjoying endless hot water without stress.

Tankless Water Heater Installation and Replacement

If your old water heater is giving you trouble, upgrading to a tankless system can transform your daily routine with dependable, energy-saving performance.

Systems We Install

We install top-quality tankless water heaters designed for Seattle’s climate and household demands. From compact electric models to powerful gas-fired units, we’ll help you choose the right size and brand for your family. Our installations are tailored to your home’s plumbing system so you get the maximum performance, efficiency, and comfort possible.

Our Tankless System Installation Process

  • We assess your current hot water needs and recommend the right size and type of system.
  • We safely remove your old water heater and prepare the space for your new unit.
  • We install new water and gas or electric connections as required for the tankless unit.
  • We set up the venting system and calibrate the equipment for peak efficiency.
  • We fully test your new system and walk you through how to use and maintain it.

Trust Gene Johnson with your traditional water heater services too!

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Diagnostics And Consultations On HVAC Systems

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*Diagnostic or repair services are not included. This is a no-obligation consultation for homeowners interested in upgrading or replacing their HVAC and/or heating systems. Offer applies to residential properties only and must be scheduled during normal business hours.

Frequently Asked Questions

Why Is My Tankless Water Heater Not Providing Consistent Hot Water?
What Should I Do If My Tankless Water Heater Displays an Error Code?
How Can I Prevent Costly Repairs on My Tankless Water Heater?
How Long Does It Take to Replace a Traditional Water Heater With a Tankless System?
What Are the Biggest Benefits of Replacing My Old Tank With a Tankless Water Heater?

Why Is My Tankless Water Heater Not Providing Consistent Hot Water?

Inconsistent hot water can happen for a few reasons. Mineral buildup in the heat exchanger, blocked filters, or low water flow are common culprits. In some cases, the system may be undersized for your household’s demand. A technician can:

  • Clean or replace clogged filters
  • Flush out scale buildup from the heat exchanger
  • Check the gas pressure or electrical supply
  • Inspect the venting and airflow system

When these parts are serviced, your system usually returns to normal operation. If the unit is too small for your family’s needs, we may recommend upgrading to a larger-capacity model.

What Should I Do If My Tankless Water Heater Displays an Error Code?

Error codes are the system’s way of telling you something is wrong. These codes can mean anything from ignition failure to venting problems. First, reset the system to see if it clears. If it returns, it’s best to call for service. A professional will:

  • Interpret the error code correctly for your model
  • Inspect electrical or gas connections
  • Clean sensors and filters
  • Replace faulty components if needed

Addressing error codes quickly helps you avoid bigger issues and costly breakdowns. Never ignore them, especially if your unit shuts off during operation.

How Can I Prevent Costly Repairs on My Tankless Water Heater?

Preventive maintenance is the key to keeping your tankless system working for years. At minimum, schedule annual professional service. During this visit, a technician will:

  • Flush the unit to remove scale and mineral deposits
  • Clean filters and sensors for proper operation
  • Inspect gas or electrical connections
  • Test water pressure and temperature settings
  • Check for leaks or corrosion around connections

These steps reduce strain on the unit and prevent surprise breakdowns. With consistent maintenance, many tankless systems last 20 years or more.

How Long Does It Take to Replace a Traditional Water Heater With a Tankless System?

The timeline depends on your home’s setup, but most replacements are done in a single day. If gas lines, venting, or electrical upgrades are needed, it might take a little longer. Typically, the process involves disconnecting and removing your old tank, installing new hookups, mounting the tankless unit, and testing the system.

Our team works efficiently so your household experiences as little downtime as possible. Most families are enjoying unlimited hot water by the evening of installation day.

What Are the Biggest Benefits of Replacing My Old Tank With a Tankless Water Heater?


Replacing a traditional tank-style water heater with a tankless unit offers multiple long-term benefits:

  • Endless hot water for back-to-back showers and multiple appliances
  • Lower monthly energy bills because water is heated only on demand
  • Space savings since tankless models are compact and wall-mounted
  • Longer lifespan, with many units lasting 20 years or more
  • Improved safety since there’s no large tank that could leak or burst

This switch is especially valuable for busy households in Seattle, where demand for hot water can be high.

Contact Gene Johnson Plumbers for Professional Tankless Water Heater Services in Seattle, WA, Today!

If you’re ready to enjoy the comfort and convenience of unlimited hot water, the team at Gene Johnson Heating, Cooling, Plumbing, and Electrical is here to help. We provide expert tankless water heater repair, installation, and replacement services designed to make life easier for Seattle families. Our technicians bring years of hands-on experience and always put your satisfaction first.

Give us a call today at 206.792.7495, and we’ll schedule a convenient appointment to show you exactly how a tankless water heater can benefit your home. Reliable service is just one phone call away.

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Within Your Budget

The best plumbing, cooling, heating, and electrical services shouldn’t have to break the bank. That’s why we are happy to provide our customers with opportunities to save on their next service with us. Our current online deals are updated periodically, so there is something for everyone, whether you are a first-time customer or a long-time loyalist.

Here are some benefits of trusting Gene Johnson with your HVAC, Plumbing, and Electrical needs.
  • Best value service in Seattle
  • Always on-time arrival
  • No mess left after a job
  • Friendly team that truly cares about your safety and comfort
  • Fixed right guarantee
  • Upfront pricing
  • Follow up calls to ensure your peace of mind
  • Range of service options- no ultimatums!

Total reviews: 4454 | Average rating: 4.8

5

Jeff was awesome. Responsive, flexible and really walked me through the various issues and options. Would definitely recommend him!

5

Easy and very convenient! They fixed my clogged sink for only $79. Great service

5

Pavel from Gene Johnson Plumbing provided us with excellent service today: replacing old faucets and water turn off connections in 4 sinks (bathrooms and washroom), replaced rubber washer and dryer hoses to bring them up to code; performed annual maintenance on gas water heater. He worked diligently and explained everything he was doing and why he was doing it. Outstanding service.

5

Mark Ochoa was our tech and did an awesome job! He flushed our water heater and checked all the plumbing fixtures. Will have him back if we encounter any additional issues!

5

Very friendly and knowledgeable team. Got things fixed and took great care of us.

5

Noah did a great job with two plumbing repairs. He was fast, efficient, respectful and left the area cleaner than when he started. He did an outstanding job of communicating with us before, during and after the work was complete. A breath of fresh air!

5

Mark O came out to unclog a downspout at my house. He was prompt, courteous and worked hard to fix the problem. I’m a member of Gene Johnson and will continue to be because of service like this.

5

Was having hot water heater issues. Was able to schedule and have a person come out in a timely manner. Steven was great at diagnosing the issue, explaining the options and fixing the problems.

5

Malulani Kaeo replaced our kitchen faucet — did a great job. He works well with people and knows what he’s doing.

5

Noah was professional and hard working. Multiple toilets had to be replaced along with some other plumbing work. He spent over 12 hours on the job and got it all done in a day. Would absolutely recommend him and Gene Johnson.

5

My sump pump that was installed by a different company 16 months ago, had the alarm go off that it wasn’t draining. So I called Gene Johnson Plumbing as they were open on the weekends when my alarm went off. Branson from Gene Johnson came out and took a look at my system. The original company hadn’t even bothered to plug my sump pump to an electrical outlet. So he was able to quickly and easily figure out what was wrong with the sump pump, he also identified that the furnace installation company had neglected to install something important on the furnace components. So he was able to fix that as well. Two different companies, he found two different mistakes, and he was able to fix everything so my system works perfectly. Thanks Branson!!

5

We had a leak under the kitchen sink this morning that flooded the floor. We were afraid that it was something major. Branson came out, immediately figured out that a clip had worked loose on the spray faucet hose, put things back together and voila!
We are grateful for the prompt, friendly, competent service from Branson and Gene Johnson Plumbing.

5

Sean is the best. He got my furnace running again. Very professional. Would have him back if needed. =)

5

Mark Ochoa is amazing!!! We had a super complicated drain clog that he worked tirelessly to address. I absolutely love this company and would not hesitate to have Mark back out to her our house. Thank you so much Mark!

5

Appointment was easy to make and reasonably priced compared to others. They provided an introduction of the assigned service tech so we had Chad Hendrix. He was pretty awesome. He took care of what we needed and also provided some good information and tips with the radiator. Would highly recommend for future services.

5

Mark Ochoa did a fantastic job for me today I would highly reccomend Mark!

5

Jaren was a pleasure to deal with. He is personable and knowledgeable. Very thorough. He took video for me to show my sewer company showing a tree root problem in the sewer main. He let me consider several options. Got my sewer line serviced in a little over two hours. No surprises at the end. I’m grateful and relieved!

5

The most delightful technician, Rene Barajas Garcia, took great care and time to find the source of our problem. I would heartily recommend him, and Gene Johnson plumbing.

5

Thank you for Andrew. Nice job. Nice guy.

5

Excellent & professional service from Chandler Price who installed our new water heater. Gene Johnson quote & installation was perfect. Chandler is a great representative for his company.