Tankless Water Heater Repair & Installation in Ontario, CA
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Ever stepped into a shower expecting a wave of warmth, only to be blasted by an icy surprise? Not fun. That’s when you realize just how much we rely on hot water. At All Pro Cooling, Heating, Plumbing & Electrical, we know how crucial that steady stream of heat is for your comfort—and your sanity. Whether you’re eyeing the sleek efficiency of a tankless unit or your current setup is misbehaving, we’re here to help.
Our Ontario plumbers have been providing expert tankless water heater repair and installation in Ontario, CA for years, helping our neighbors stay cozy, save space, and cut down on energy bills. Let’s dive into how we can do the same for you.
Tankless Water Heater Repair Services in Ontario, CA
If your tankless water heater’s on the fritz—maybe the hot water is lukewarm, or maybe it’s ghosted you completely—we’ve got your back. From odd noises to error codes, our repair services cover it all. We’re local, fast, and we don’t mess around when it comes to restoring your comfort.
All Pro’s Tankless Hot Water Heater Installation Process
Thinking about making the switch to a tankless water heater? Good call. We’ve helped hundreds of Ontario customers get set up with energy-efficient, reliable tankless systems—and the process is smoother than you might expect.
Here’s how we do it:
Step 1: Consultation
We kick things off with a home visit to check out your current water heater setup, your hot water demand, and your energy source—gas or electric. We’ll talk you through your options, answering any and all questions along the way.
Step 2: Selection
We’ll help you pick the perfect unit for your home. Whether you’re going electric or gas, we’ve got a range of top-performing brands to choose from.
Step 3: Installation
Our certified plumbers handle everything—from disconnecting and removing your old system to setting up the new one. We’ll make sure your tankless unit is installed to code, safely vented, and perfectly calibrated.
Step 4: Test & Teach
Once your new system’s up and running, we’ll run performance checks and show you how to use it. No guesswork, just hot water when you need it.
Tankless Water Heaters We Install (Electric, Gas, etc.)
Not all tankless water heaters are created equal—and what works for your neighbor might not be right for you. We install:
Gas Tankless Water Heaters
Perfect for households with higher hot water demand. Gas units heat water quickly and efficiently, especially during peak use. Many Ontario homeowners love them for their speed and savings.
Electric Tankless Water Heaters
Ideal for smaller households or homes without access to natural gas. They’re compact, easy to install, and incredibly efficient—especially for point-of-use needs like bathrooms or kitchen sinks.
Condensing and Non-Condensing Units
Condensing tankless water heaters are the superstars of efficiency, reusing exhaust heat to pre-warm incoming water. Non-condensing models, while slightly less efficient, tend to have lower upfront costs.
Whatever your space, budget, or water heater goals—we’ll help you choose a system that checks every box.
Tankless Water Heater Repair in Ontario, CA
Your tankless water heater works hard. And while it’s built for longevity, things can go sideways from time to time. When that happens, our expert plumbers are just a call away. We specialize in tankless water heater repair and installation in Ontario, CA, and show up ready to get your system humming again.
Common Tankless Water Heater Repairs We Deal With
We’ve seen it all—and fixed it all. Tankless water heaters are smart and efficient, but like any appliance, they’re not immune to trouble. When something goes wrong, it can throw your whole household off balance. Here are some of the most common tankless water heater problems we encounter in Ontario homes, along with how we tackle them:
No Hot Water
This one tops the list for obvious reasons—it’s hard to miss when your “hot” shower turns into a polar plunge. The cause could be a variety of things: a lack of gas or electric power, a tripped circuit breaker, or even a closed gas valve. More often, it’s a faulty flow sensor not detecting water movement, so the system doesn’t heat up. Sometimes it’s an air supply or venting issue that’s cutting the combustion process short. Whatever the root cause, we’ll trace the problem and restore your instant hot water fast.
Fluctuating Temperatures
Inconsistent water temperature can be downright maddening. One second it’s warm, the next it’s freezing—or scalding. This issue often stems from mineral scale buildup inside the heat exchanger, especially in hard water areas like Ontario, CA. Other culprits could be dirty inlet filters, improperly sized units, or a failing thermostat that can’t regulate heat correctly. We’ll flush the system, clean out filters, and recalibrate or replace the thermostat if needed.
Corroded Parts
While tankless water heaters are built for longevity, internal corrosion can still become a problem—especially in areas with hard or acidic water. Corrosion often starts inside the heat exchanger, where metal is exposed to constant heating and cooling cycles. You might notice rust-colored water, strange noises, or reduced heating performance. We’ll inspect and clean or replace corroded components, and if necessary, install corrosion-resistant fittings or recommend a water treatment system to prevent future damage.
Malfunctioning or Broken Components
Every tankless system has a mix of electronic and mechanical parts—flow sensors, thermostats, fans, gas valves, circuit boards—all of which can wear out over time. If your system suddenly stops working or shows erratic behavior, there may be a failing part behind it. We’ll run diagnostic tests, isolate the problem, and replace faulty components with genuine parts to restore performance. It’s all about getting your system back up and running without a full water heater replacement.
Error Codes on Display
Tankless units are like the smart devices of the plumbing world—they’ll flash an error code when something’s amiss. That’s helpful, but it can also be confusing unless you’ve memorized the manual. Codes might indicate anything from a venting issue, to ignition failure, to overheating. We know the error codes across major brands like the backs of our hands, and we’ll not only interpret them but fix the problem behind them so you’re not stuck Googling numbers while freezing in a towel.
Low Water Pressure
A sudden drop in water pressure can make it feel like your shower is being run through a straw. Often, this traces back to a clogged water filter, sediment or lime buildup in the pipes, or scale blocking the heat exchanger. In rare cases, it could also be a sign of a failing pump or pressure valve. We’ll clear out the blockage or swap out the damaged components to restore your system’s flow and efficiency.
Ignition or Flame Failure
If your gas tankless water heater isn’t igniting, you won’t get any hot water—period. This could be caused by something as simple as a dirty flame sensor or as complex as a malfunctioning gas valve or ignitor. Cold weather can also cause frozen condensate lines, which will shut the whole system down. We’ll inspect your gas supply, clean or replace sensors, and ensure your ignition system is sparking as it should.
Leaking Unit
Tankless doesn’t mean leak-proof. If you see water pooling beneath your unit, don’t ignore it. Leaks can come from loose fittings, internal seals that have worn down, or even a cracked heat exchanger. Left unchecked, leaks can lead to corrosion, electrical hazards, and even structural damage in your home. We’ll pinpoint the source, stop the leak, and recommend repairs—or replacement if the unit is compromised.
Tankless Water Heater Maintenance
Want to make your tankless water heater last as long as possible? Maintenance is key.
We recommend an annual check-up for most systems—more often if you have hard water in your area (and let’s be honest, most of Ontario does). Maintenance includes descaling to remove mineral deposits, inspecting filters, checking for corrosion, and cleaning the burners or heating elements.
Neglecting this step? It’ll shorten your system’s lifespan and drive up energy costs. Think of maintenance as an oil change for your water heater—quick, painless, and essential.
Bonus: Regular maintenance helps you catch small problems before they become wallet-busting repairs.
We Also Install and Repair Traditional Storage Tank Water Heaters
Not everyone’s ready to go tankless—and that’s totally okay. At All Pro, we also install and repair traditional hot water heaters with storage tanks. Whether it’s a 40-gallon electric model for a condo or an 80-gallon gas unit for a family of six, we’ve got the know-how and inventory to handle it.
Need a repair in Ontario, CA? We’ll diagnose and fix issues like pilot light failures, leaky tanks, faulty thermostats, and sediment buildup. Our repair services are fast, affordable, and always reliable.
Looking to upgrade? If your water heater is more than 10 years old or just can’t keep up with demand, we’ll help you choose the perfect replacement and install it with zero hassle.
Check out our full page on storage tank water heaters here: Traditional Water Heater Services
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The ALL PRO Membership
As an ALL PRO Member, you’re backed by the beary best guarantees, offers, & priority scheduling.
Optimize performance, lower energy bills, prevent costly repairs, preserve warranties & experience peace of mind. All is paw-sible as an ALL PRO member.
- PRIORITY SERVICE SCHEDULING Get scheduled ahead of non-members when you need a diagnostic service call.
- 4 TUNE-UPS PER / YEAR A certified technician will tune up your cooling, heating, plumbing & electrical systems.
- NO BREAKDOWN GUARANTEE We guarantee your system will not break down within six months of service. In the rare chance a breakdown does occur within six months of services, we will waive all dispatch & diagnostic fees, & apply a $100 credit towards any repair needed.
- 15% OFF SERVICE REPAIRS As a member, get 15% off service repairs & indoor air quality products
- CREDIT TOWARD INVESTMENT 100% of your membership fees (up to $500) can be credited towards a replacement.
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Top-Rated Plumbing, HVAC & Electrical Services
We remain steadfast in our commitment to providing outstanding customer service and tailoring our solutions to meet our customer’s unique circumstances. We take the time to understand your specific needs, as well as your budget, working closely with you to ensure that your problem is resolved efficiently and effectively the first time.
It’s because of our care for our customers that we have earned the 2020 Best of HomeAdvisor award and been awarded by Expertise.com as one of the best plumbers in the area.
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Additional Resources
How long does it take to install a tankless water heater?
Do I need permits for a tankless water heater installation in Ontario, CA?
My unit keeps giving me an error code. What should I do?
Can tankless water heaters be repaired, or do they need to be replaced?
How often should I flush or descale my tankless water heater?
Are tankless water heaters better than traditional ones?
When should I replace my water heater?
How long does it take to install a tankless water heater?
Usually, a tankless water heater installation takes between 4–8 hours. However, several factors can extend the timeline. We always keep you informed throughout the process so there are no surprises. Here are five common reasons an installation might take longer:
Upgrading Gas Lines or Electrical Systems
Tankless units require a specific level of gas or electrical input to run efficiently. If your current setup isn’t sufficient—say, your gas line is too small or your breaker panel can’t handle the load—we’ll need to upgrade those connections. That can add a few hours to the job but ensures safe and optimal performance.
Venting Adjustments or Installations
Tankless systems need proper venting for exhaust gases (especially gas-powered models). If your home doesn’t have existing venting in place, or if the vent route needs rerouting due to the location of the new unit, we may need to drill through walls or ceilings and install special materials like stainless steel vent piping.
Changing Water Line Locations
If the new unit is being installed in a different spot than your old water heater, we’ll have to reroute the hot and cold water lines to match the new layout. This can be straightforward or complex depending on the distance and how accessible your plumbing is behind walls or in crawlspaces.
Removing Old Systems or Dealing with Obstructions
Sometimes removing an old tank-style water heater takes longer than expected, especially if it’s corroded, stuck in place, or tucked into a tight closet or alcove. Likewise, drywall, cabinetry, or other structural obstacles can slow us down if we need to carefully cut through or around them to access plumbing or install the new unit.
Local Permitting and Inspection Requirements
In Ontario, CA, water heater installations often require a permit and a post-installation inspection from the city. While we handle all the paperwork and coordination, the availability of inspectors or required documentation can occasionally delay the final approval step—though we always work to streamline this for you.
Do I need permits for a tankless water heater installation in Ontario, CA?
Yes, most installations require a city permit to ensure your system meets local codes. Don’t worry—we’ll handle the paperwork and scheduling with the city for you.
My unit keeps giving me an error code. What should I do?
First, jot down the code and reset the system (many have a power button or reset procedure). If the problem persists, give us a call. We’ll decode it and take care of the fix.
Can tankless water heaters be repaired, or do they need to be replaced?
In most cases, repairs are totally doable—especially for common issues like faulty sensors, clogged filters, scale buildup, or ignition problems. These systems are built with serviceability in mind, and replacing individual components like flow sensors, thermostats, or circuit boards can bring a unit back to life quickly and affordably.
However, if your system is getting up there in age—say 15 years or more—or it’s showing signs of a major failure (like a cracked heat exchanger or extensive corrosion), replacement may be the smarter financial decision. In those cases, investing in a new, energy-efficient model can save you more in the long run than pouring money into an aging system. Either way, we’ll always give you an honest assessment and walk you through your options.
How often should I flush or descale my tankless water heater?
At least once a year. If you’ve got hard water or notice scale buildup around faucets, we recommend flushing every six months. We can handle this during a scheduled maintenance visit.
Are tankless water heaters better than traditional ones?
They’re definitely more efficient and compact, and they deliver instant hot water on demand without the standby heat loss that comes with a traditional tank. That means you’re not heating water 24/7—only when you need it—which can lead to noticeable savings on your energy bills over time. Plus, their slim design frees up space in tight utility closets or garages, and you’ll never run out of hot water in the middle of a shower again (provided the unit is sized correctly).
These being said, the upfront cost is higher, both for the unit and the installation, especially if you’re converting from a tank system. But when you consider the energy savings, longer lifespan (often 20+ years), and convenience, many homeowners find the investment well worth it in the long run.
When should I replace my water heater?
If you’re seeing rust-colored water, leaks, strange noises, or if the unit’s pushing 10–15 years old—it might be time for a replacement. We’ll inspect it and give you an honest recommendation.
Why Choose All Pro Cooling, Heating, Plumbing & Electrical?
When you need high-quality tankless water heater repair service and water heater installations, you can always rely on the expert Ontario water heater service experts at All Pro Cooling, Heating, Plumbing & Electrical.
We include the following unique features and benefits to add even more value to our work:
- 24/7 Emergency Service: When you need emergency water heater service, we are available to provide it. Our technicians are on-call 24/7.
- Free Estimates*: We offer free estimates and fast one-hour service on most service calls.
- Customized Options: Everyone deserves amazing service. We offer options for all our service calls to make sure homeowners get their problems solved at any budget.
Reading for Endless Hot Water? Give Us a Call!
There’s no reason to settle for a water heater that doesn’t keep up with your life. At All Pro Cooling, Heating, Plumbing & Electrical, we make tankless water heater repair and installation in Ontario, CA simple, stress-free, and downright satisfying.
From flawless installations to fast, affordable repairs, our experienced plumbers have your back. We’re all about comfort, efficiency, and doing things the right way the first time.
Call us today or book your appointment online. Let’s get your hot water flowing—on demand, just the way it should be.