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Tankless Water Heater Installation Repair Services Seattle, WA

Tankless Water Heater Services in Seattle, WA

over 4578 reviews

    Our Tankless Water Heater System Services for Seattle Homeowners

    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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      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.

      To top

      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.

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      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.

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      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.

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      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.

      To top

      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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      Service Car - Gene Johnson Heating, Cooling, Plumbing & Electrical
      QUALITY SERVICE

      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!
      FINANCING

      Total reviews: 4578 | Average rating: 4.8

      5

      Summary: Gene Johnson sent a tech (Matt Hunter) to address our home heating system, which was sending no heat at all to many rooms in the house. Our system is a wonky spaghetti mess of piping, controllers and pumps that theoretically delivers hot water to legacy cast iron radiators, new floorboard radiators, and seven in-floor hydronic loops. It has not worked as intended since we bought the house 15 years ago. It has likely *never worked right since the last house renovation 25 years go (2000), given the horrid “design” that was implemented then. Matt was the first tech ever to figure out how it all works. He repaired every failed component and problem that could be fixed, given our disastrous configuration. We are completely satisfied with Matt’s work and privately are enormously grateful that this money hole has now been tamed. Our house dates to 1918, so challenges in upgrading the heating plant in 2000 were a certainty. However, the zoo in our HVAC room is nearly indecipherable. I have hired one HVAC company after another over last 15 years to make sense of it, at great expense. Ninety percent of past techs gave incomplete explanations, proposed the replacement of a pump or controller, or the addition of a valve, and then left. Some were honest enough to simply offer a theory of how it works, while admitting they didn’t know, and then left us with a big bill. Enter Matt Hunt. Not sure if Matt looks the part of genius plumber, but then I’ve never seen one till now. He’s a little nerdy perhaps (like me) and also a dirt bike racer. Whatever: Matt alone successfully unraveled the mysteries of our home hot-water distribution plant. He confirmed that the entire house is controlled by two thermostats, which are, incredibly, located just 16 feet apart on the first floor. (One controls all hot water distributed on the north side of the house; one controls all hot water sent to the south side. Go figure.) Matt explained why heat often doesn’t reach the upper floors even when the system is “working” (if it’s warm on the first floor, naturally, no heat is available to the second and third floors). Matt discovered that the pressure in the water distribution lines was only 4PSI (target range: 13-22PSI), determined that the cause was huge amounts of air in the pipes, and the culprit was a broken refill valve. The new valve includes a pressure gauge so we can now see when the pressure in the water lines has fallen so low that the system can’t deliver hot water to the upper stories. He also spotted problems with the air eliminator, i.e. the “burping” component that normally should purge some/most of the air. He has proposed replacing that (agreed). Matt drained the pipes on all floors; refilled the lines; purged all zones of air; and replaced the (broken) thermal expansion tank. Heat began to flow again to all rooms. He demosnttated that heat only happens on the upper floors provided that the two first-floor thermostats that control distribution to the entire home are below target temps and are calling for heat. Matt mapped every radiator and hydronic zone to the main thermostat controlling it. He also determined which rooms/areas the hydronic thermostats control. (Of course, the hydronic thermostats, which are sprinkled around the house, are comic: they only perform as intended when the primary thermostats on the first floor are delivering hot water.) Matt gave us a detailed written explanation of what each component does and how it’s controlled. Matt did all this in less time than some prior techs took to try and ultimately give up. Our home heating system is a design wreck and will never deliver heat around the house reliably. However, with the fixes (and insights) mATT delivered, we now get heat when we want it with some work-arounds (like cooling down the first floor therostats). Further, we understand how to spot problems and fix the system going forward. Thank you, Matt!

      5

      Steven came out to troubleshoot our tankless water heater and quickly identified the issue as a clogged condensate pump. What really stood out was the time he took to explain everything in detail. He walked me through the condition of the unit, the manufacturer’s recommended lifespan, and the condensation damage and rust that had already occurred due to the blockage.

      Steven gave me honest, thoughtful guidance and helped me make an informed decision about replacing the unit, without any pressure whatsoever. He clearly explained that we could have gotten by with a descaling for now, but also helped me understand why replacing it would likely save money and headaches over the long run.

      He was patient, knowledgeable, and answered all of my questions thoroughly. I really appreciated his transparency and professionalism, and I would absolutely recommend Steven and Gene Johnson to anyone needing plumbing or tankless water heater service. Thanks!

      5

      Very knowledgeable. Mike Keane really did an awesome job. Highly recommend these guys for all your plumbing needs. Definitely going to be a life long customer.

      5

      Joseph F came for a leak we were experiencing along with his partner and was beyond helpful. We have a 4 month old and also had a contractor there at the same time. He was kind enough to entertain our little one in his swing while my husband was moving some things in the bathroom and I was talking to the contractor. So unexpected and beyond the call they came out for. Thank you!

      5

      Jaren was great to work with! he came for the drain and returned for the toilet. Ran into some issues with both but resolved them quickly. good Job!

      5

      Right on time, quickly fixed the problems, friendly

      5

      Sean Smith is a great plumber that does a great job!!! Very happy with the new set up!! He was compassionate & professional all from day 1. We greatly recommend him!!!! Thank you Sean for all that you did & staying late to get the job done. ❤️

      5

      Michael K was extremely thorough and very easy to understand when explaining our plumbing problem. I would highly highly recommend using him in the future.

      5

      Jaren replaced the kitchen faucet. He did a great job!

      5

      Michael K. did a phenomenal job helping with our plumbing issue. He was professional, courteous, and detailed in his work. He made everything very easy to understand, and worked very efficiently from start to finish. I would recommend him and Gene Johnston Plumbing to anyone looking for a reliable plumber that’s a true professional.

      5

      Great service!

      5

      Worked with Mark O. this morning who was knowledgeable, helpful, and able to resolve this clog within 30 minutes. Thanks Mark!

      5

      Steven did a great, thorough job of inspecting systems for a house that we were going to buy.

      5

      Mike arrived on time, quickly diagnosed our problem and suggested a workable solution, which he then implemented. We felt well served.

      5

      Very outstanding service!
      Stephen and Joe appreciate your detail job

      5

      We had a clogged drain in our Weird Old House that was above the proverbial pay grade of our usual maintenance folks. Mike from Gene Johnson Plumbing sorted it out quickly and efficiently, and even informed us how we can maintain it ourselves going forwards. Great service!

      5

      Steven was awesome and very informative.

      5

      Excellent service! He explained what was wrong and explained how he was going to fix it.

      5

      Great service, well explained and very thorough.

      5

      I had a lingering issue with my kitchen faucet, valve and water pressure. I got ridiculous quotes from multiple plumbing companies.

      Derek Solberg, the technician from Gene Johnson was a breadth of fresh air. He was to the point, explained that some of the issues could be resolved DIY. Gave me options to that resolved my immediate issue within a reasonable budget.

      Highly recommend Derek Solberg

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