Tankless Water Heater

A tankless water heater is a compact, wall-mounted unit that heats water on demand rather than storing it in a bulky tank. These systems offer energy savings, endless hot water, and a smaller footprint in your home. Whether you're considering installation, maintenance, or upgrading from a traditional model, Angi helps you find the right pro and resources to get the job done.

Related to Tankless Water Heater Service

Tankless Water Heater Service Articles and Advice
Kyle Schurman  •  Apr 10, 2026
Does a Tankless Water Heater Increase Home Value?
A tankless water heater can increase your home’s value and save you money on your monthly electricity bills. Here’s why a tankless water heater is worth it.
Kyle Schurman  •  Apr 10, 2026
Tankless Water Heater Pros and Cons
Discover all the tankless water heater pros and cons you should know. Learn how these energy-efficient systems can save you money and space while considering their limitations.
Mizuki Hisaka  •  Apr 10, 2026
How Long Should Hot Water Last in the Shower? A Quick Guide
If you like long showers, you may be wondering: How long should the hot water last in the shower? The answer depends on a few factors, so read on to find out.
Xiao Faria daCunha  •  Apr 10, 2026
How to Install a Tankless Water Heater
Knowing how to install a tankless water heater is a skill often left to licensed pros. Get an overview of the installation process for gas and electric tankless water heaters.
Xiao Faria daCunha  •  Apr 10, 2026
What to Do if Your Tankless Water Heater Freezes
Did your tankless water heater freeze due to unexpected cold weather? Follow these steps to thaw your unit and prevent future freezings.
Angi  •  Apr 6, 2026
How Much Does Tankless Water Heater Repair Cost? [2026 Data]
Find out the average tankless water heater repair cost, what impacts pricing, and how to save. Get expert tips to plan your repair budget with confidence.
Amy Freeman  •  Apr 5, 2026
Who Fixes Tankless Water Heaters? Here’s Who to Call
Not sure who fixes tankless water heaters? In most cases, you’ll want to call a plumber.
Tony Carrick  •  Apr 5, 2026
How Long Does a Tankless Hot Water Heater Last?
How long do tankless water heaters last? The appliance’s lifespan can vary based on several factors. Learn more using our guide.
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Common Tankless Water Heater Service Questions

Descale the system annually, clean filters, and check for leaks to ensure efficiency.

Your tankless water heater should be serviced every few years. If you live in an area with hard water, then an annual flush is recommended. Always watch for error codes and noises to see whether you need to service your tankless heater sooner. Find a water heater repair pro to inspect and service your water heater if you suspect any issues.

Expect to spend at least thirty minutes to an hour for your tankless water heater to thaw. Using a small space heater can slightly speed up the process. If you believe the connecting pipes are also frozen, you can use a hairdryer to help the pipes thaw while your water heater is thawing. This may save you a decent amount of time.

When it comes to which pump to use to descale a tankless water heater, the type is more important than the size. In general, you want it to have a horsepower of 1/5 hp or 1/6 hp. As long as it meets these requirements, it doesn’t matter how large or small it is.

Tankless water heaters cost about $2,550 on average, with prices ranging from $1,400 to $3,800. The lowest prices are around $370 and go up to about $5,800 at the high end of the price range. When installing a tankless water heater, consider the brand of water heater, the size, type, quality, energy type, quantity (single-point or whole-house), gallons per minute (GPM), condensing vs. non-condensing, tax credits, materials, and your geographic location.