(904) 460-2998

Jacksonville, Ponte Vedra & St. Johns CountyTankless Water Heaters. Endless Hot Water. Honest Advice.

365 Solutions installs, repairs, and maintains tankless water heaters throughout Jacksonville, Ponte Vedra, and St. Johns County. Whether you’re upgrading or need a repair, we’ll explain your options and provide upfront pricing.

  • Locally owned
  • No commissions
  • No pressure
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Trusted by
your neighbors.
Trusted by
your neighbors.

Straight answers first

Installing, repairing or maintaining tankless? Start here.

Choose a topic for what to consider, safe checks and what our plumbers will do. You don’t need to diagnose anything yourself.

Thinking about switching to tankless?

A tankless water heater heats water only when you turn on a tap, so it doesn’t run out and doesn’t keep a tank of water hot all day. It mounts on the wall, which frees up floor space in a garage or utility closet. Whether it’s a good fit depends on how much hot water your household uses at once, your gas or electrical service, and where the unit and its venting can go.

What to consider before upgrading

  1. Sizing. Tankless units are sized by flow rate (gallons per minute): how many showers, faucets and appliances run at the same time. An undersized unit runs lukewarm when two showers are on.
  2. Gas or electric service. Gas units often need a larger gas line. Electric units can need a dedicated circuit and more capacity than your electrical panel has to spare.
  3. Venting and location. Gas models need proper venting to the outside, and some need a condensate drain, so where the unit can be mounted matters.
  4. Upfront cost vs. running cost. Tankless usually costs more to install than a tank replacement, but it uses less energy and, with yearly maintenance, lasts longer than a tank.

Is tankless right for your home?

We’ll look at your hot-water use, your gas or electrical service and where the unit would go, then recommend the right size and model.

What 365 will do

We’ll give you an upfront price before any work begins, handle any gas, electrical or venting upgrades, mount the unit, and test flow and temperature before we leave.

Call (904) 460-2998

Tankless water heater not working right?

Most tankless problems show up as no hot water, water that turns cold mid-shower, temperatures that swing, or an error code on the display. Common causes include scale buildup in the heat exchanger, a clogged inlet filter, ignition or flame-sensor faults, a failed flow sensor, or a gas-supply or water-pressure problem.

Safe things to check first

  1. Write down the error code. Most units show a code on the display. Note it or take a photo. It tells our plumber where to start.
  2. Check the power and gas. Make sure the unit has power and the gas valve to it is open. If you smell gas, leave the house and call your gas company from outside.
  3. Open the tap a little more. A tankless unit needs a minimum flow of water before it fires. If only a trickle is running, open the hot tap further and see if it heats up.
  4. Check other faucets. If one faucet runs cold but the others are fine, the problem may be that fixture, not the water heater.

Still not working?

Call us if the error keeps coming back, the unit won’t fire, the water stays lukewarm, or you see water around the unit.

What 365 will do

We’ll diagnose the unit, explain what’s wrong and give you an upfront price before any repair, whether it’s descaling, a sensor, ignition parts, or a gas or water-pressure issue.

Call (904) 460-2998

Keeping your tankless water heater running well

Minerals in the water slowly build up as scale inside a tankless unit’s heat exchanger. Over time that means longer waits for hot water, temperature swings, error codes and a shorter life for the unit. Most manufacturers recommend a flush at least once a year, and more often if your water is hard.

What a maintenance visit includes

  1. Descaling flush. We circulate a descaling solution through the heat exchanger to dissolve mineral buildup.
  2. Filter cleaning. We clean the inlet water filter so water flows freely through the unit.
  3. Burner and gas check. On gas units, we check gas pressure and burner operation.
  4. Venting, sensors and a test run. We inspect the venting and flow sensors, then test flow and temperature.

Signs it’s due

It’s been more than a year since the last flush, hot water takes longer to arrive, the temperature swings, or the unit shows a maintenance or scale code.

What 365 will do

We’ll flush and inspect the unit, tell you about anything that needs attention, and give you an upfront price before any repair.

Call (904) 460-2998

Why Choose Us for Tankless Water Heater Services?

Tankless Upgrades Customized to Your Home

At 365 Solutions, we provide expert service, honest pricing, and fast response times to keep your hot water system running efficiently. Our certified technicians specialize in tankless water heater installation, repair, and maintenance.

  • Certified technicians with experience in all major tankless brands
  • Upfront pricing with no hidden fees
  • Financing available through GreenSky, subject to credit approval — see options
  • Same-day service available for urgent water heater issues
  • Locally owned & operated, serving homeowners in Jacksonville, St. Johns, and Ponte Vedra Beach

Got questions?

Your tankless water heater questions. Answered.

Straight answers about costs, common problems and more, without the jargon or the sales pitch.

Don’t see your question?

Call and ask. You’ll talk to someone in our Nocatee office.

(904) 460-2998

Costs & your service visit

Pricing and what to expect.

How much does a tankless water heater installation cost?

The cost of tankless water heater installation varies based on:

  • Type of unit (gas or electric)
  • Size and capacity needed for your home
  • Plumbing modifications or venting requirements

Choosing the right option

Help deciding what makes sense for your home.

How does a tankless water heater work?

A tankless water heater heats water on demand rather than storing and continuously reheating water in a tank. When you turn on a hot water tap, cold water flows through a heat exchanger, where it is rapidly heated by gas burners or electric elements before being delivered to your faucet. This process ensures unlimited hot water while reducing energy consumption.

What are the benefits of installing a tankless water heater?

Installing a tankless water heater provides:

  • Unlimited hot water – No more running out of hot water
  • Energy efficiency – Reduce energy use by up to 30%
  • Longer lifespan – Tankless units last 20+ years with proper maintenance
  • Space-saving design – Compact and wall-mounted, freeing up storage space

If you're looking for a more efficient and reliable hot water solution, a tankless system may be the best option.

How long does a tankless water heater last?

With proper maintenance and annual descaling, tankless water heaters can last 20+ years—nearly twice the lifespan of traditional water heaters. 

Do tankless water heaters work for large families?

Yes! Tankless water heaters can be sized to accommodate large households with high hot water demand. The right unit is based on flow rate (GPM) and the number of simultaneous water uses (e.g., showers, dishwashing).

Our experts can help determine the best tankless model for your home.

What is involved in installing a tankless water heater?

When you install a tankless water heater, the process includes:

  • Assessing your home's hot water needs to determine the right system size
  • Upgrading gas or electrical connections to meet the unit's power demands
  • Mounting the tankless water heater in an appropriate location
  • Ensuring proper venting and drainage for gas models
  • Testing system flow and performance to confirm efficiency

Our experts at 365 Solutions provide full-service tankless water heater installation with upfront pricing and guaranteed results.

How often should I service my tankless water heater?

Regular tankless water heater servicing is essential for efficiency and longevity. Most manufacturers recommend annual maintenance, which includes:

  • Flushing the system to remove mineral buildup
  • Inspecting the heating elements and burner for performance issues
  • Checking gas lines, venting, and electrical components
  • Ensuring proper water pressure and flow rate

Neglecting maintenance can lead to reduced efficiency, longer heating times, and potential system failures. Our tankless water heater service plans help keep your unit running at peak performance.

Do tankless water heaters require more maintenance than traditional water heaters?

Tankless water heaters typically require less frequent repairs than traditional systems, but regular maintenance is still essential for long-term performance. Over time, mineral buildup from hard water can affect efficiency, especially if your home’s water has high calcium or magnesium levels. To prevent scaling, we recommend servicing a tankless water heater at least once a year. This includes flushing the system, checking for clogs, and inspecting the heating elements. Regular maintenance helps extend the lifespan of your tankless water heater and keeps it running efficiently.

Service area & scheduling

Where we work and how fast we get there.

Where can I find tankless water heater service near me? How do I find reliable tankless water heater installers?

Finding experienced tankless water heater installers is essential for proper setup and long-term performance. Look for licensed professionals with experience in tankless system installation, gas line connections, and venting requirements. Always check for certifications, customer reviews, and manufacturer partnerships when vetting a team. 

Where can I find tankless water heater repair near me?

If you're searching for tankless water heater repair, it’s important to choose a team experienced in diagnosing and repairing tankless systems. Common tankless water heater problems include:

  • Fluctuating water temperatures
  • Error codes on the control panel
  • Ignition or burner failure
  • Clogged inlet screens or mineral buildup

We provide fast and reliable tankless water heater repairs, restoring your system to full efficiency. Whether you have a gas or electric tankless water heater, our technicians have the expertise to troubleshoot and fix the issue quickly.

Reviews

What your neighbors say

5.0 ★★★★★423 Google reviews · Read them all
★★★★★AC · weekend
“Had AC problems over the weekend, called 365 Solutions late Sunday and Tom called me back…”
Warren B. · Jun 2026 · tech: Tom Google
★★★★★Water heater
“My hot water heater busted and was pouring water out of the bottom. I called 365 at 9 am…”
Richard M. · Jul 2026 · tech: Justin Google
★★★★★Air quality · HVAC
“Brian is outstanding as he took time to fully educate us on Air Filtration and HVAC systems…”
Joe A. · Aug 2026 · tech: Brian Google

Keep it from breaking in the first place.

For one affordable monthly fee, the 365 Protection Plan helps keep your AC and plumbing running smoothly, with preventive maintenance, preferred pricing and priority service when you need it most.

See the plans

Where we work

Based in Nocatee. Working across Northeast Florida.

Our technicians work from our office in Nocatee and serve homes across St. Johns County, Jacksonville and the Beaches.

Towns we serve

Also serving

Bartram ParkBeacon LakeDel WebbDurbin CrossingFruit CoveMadeiraPalenciaPalm ValleyRivertownSawgrassSilverleafWalden Chase

Something not working? Let's take a look.

Book in about a minute, or call and talk to someone in Nocatee.

(904) 460-2998