Servicing all of New Jersey

24/7 Emergency Service

phone icon

(609) 799-3434

24/7 Emergency Service

phone icon

Tankless Water Heater Repair in New Jersey

Trusted Water Heater Repair Services in New Jersey

(609) 799-3434

Tankless Water Heater Repair That Restores Your Routine

You move through your day without planning around hot water or wondering if your morning shower will be warm.

A tankless water heater that stops delivering hot water disrupts everything. When your system flashes an error code or cycles without producing hot water, you need it restored quickly and fixed so the problems don’t return.

Princeton Air provides tankless water heater repair in New Jersey with licensed plumbers who understand how these systems operate, from combustion and venting to scale buildup and diagnostics. For quality repairs and fast response, call Princeton Air or schedule online today.

Emergency Tankless Water Heater Repair Available 24/7

A failed tankless unit leaves your home without hot water until the problem is fixed.

Princeton Air responds to emergency plumbing calls any hour of any day. Unlike a tank water heater that holds a reserve, a tankless failure shows up at the next opened faucet, which is why a fast response matters. Reach out by phone or through online scheduling, and your licensed plumber will arrive prepared with the diagnostic tools and common parts that tankless equipment requires.

(609) 799-3434

4.7
Based on 6447 reviews
powered by Google
review us on

Carrier Factory Authorized Dealer
North American Technician Excellence - NATE - Certifying the Finest in HVACR
NAIMA contractor badge - Ask me about tax credits

The Expertise That Tankless Systems Actually Need

Tankless equipment works differently from tank water heaters, and your repair team should know it cold.

Princeton Air has repaired residential tankless water heaters in Hamilton Township and the greater Princeton, New Jersey area for years, spanning every major residential brand including Rinnai, Navien, Rheem, and Noritz. Tankless units use condensing heat exchangers, high-BTU burners, and precise flow sensors that require specific diagnostic skills. Your licensed plumber brings that specialization to every service call.

50+

Years in Business

700

Skilled employees

24/7

Emergency Service

500

Trucks on the Road

Call (609) 799-3434 to schedule a tankless water heater repair.

Questions?

How a Tankless Repair Visit Works at Your Home

You should expect a professional process from first contact through a verified repair.

Each step of the visit is built around reading the equipment accurately and confirming the repair before the plumber leaves.

You get in touch by phone or online scheduling. Our team member gathers the specifics about your unit (make, model, fault code if one is displaying, what symptoms you’re seeing) and confirms a service window that fits your day.

Your licensed plumber inspects the unit, reviews any error codes, and traces the actual cause rather than starting with assumptions. You’ll get an estimate in writing with the scope detailed before the repair work starts.

Your plumber handles the repair with attention to the details tankless equipment demands, from proper gasket torque to correct venting terminations. Before the visit ends, you see the unit running through its full operating cycle so you know the repair has resolved the issue.

(609) 799-3434

What Our Customers Are Saying

100% Satisfaction Guarantee

4.7
Based on 6447 reviews
review us on
Paulette Briddle
Our Tech Dominic was Awesome!! Thank you so much!!
Paulette Laubsch
On time. Completed work on all units … Heater, air conditioner, and hot water heater … Within the time frame.
Emily Escott
After a few mishaps, Princeton Air came through and got my AC system running when the temperatures are soaring.

Thanks to Will and my technician, Alberto, for getting everything fixed.
Stephen O'Reilly
Responsive, knowledgeable, dependable, & honest. Thank you for getting out heat up & running!

Update:10/12/18
Chris S got the heat last year and remembered when he arrived today, asked if it had a problem since. He came back to do a PM on the heater and while he was waiting for me to arrive, he opened up the air conditioner to inspect it and saw the coils were filthy. Took out his hose and cleaned them. Then when done, did the heater PM and then “said I just want to verify that ringing noise went away. Your house will cool much faster now!” I really like what Princeton air offers, quality and care, diagnose and fix. Not rushing to get to the next job. They’re so good I got the year round service plan.

Update may 2025&2026
Maurice is fantastic.
Zebulon Nelessen
Prompt and knowledgeable. Great technician.
Gina Clark
There was an urgent need for a mold problem to be handled in a bathroom. They quickly identified the problem, tested the seriousness, and took care of it – in a very timely fashion. They communicated with me all along the way so I could fully comprehend what was going on. All the people were very knowledgeable, pleasant and accommodating. My experience with them was excellent, and I would highly recommend them.
Marsha Goy
Eric M. was prompt, professional, courteous and quite helpful. I become a better consumer when I understand the problem & possible solutions. Eric was willing to answer my questions and made me feel secure that he would follow up to help fix our problem.

New review: 2/6/2018
Notice a problem with the humidity in my home, called and got a service appointment in the same day. Will D came out and sure enough, confirmed there was a problem, explained what exactly was happening, why it was happening and how to check that it was working correctly. His demeanor was pleasant, he was professional and seemed to be quite knowledge!
Kathy Rebechi
Great service. Domenic was so helpful and explained everything done.
Eileen Galton
Jermaine Richmond was very knowledgeable and explained my plumbing issue throughly. Thank you.
Jianzhong Yu
Pretty micron air was quick to fix my sewer
Todd Kelman
Friendly and efficient. Quick response service
Geoff Sherry
Eric did a fantastic job
Saurabh Bahl
Installation of water heater hvac and furnace – very professional and process oriented –
Victoria Orzechowski
The technician who came was Jonathan Redondo. He was very knowledgeable and did an excellent job! I would highly recommend him .
TH Peng
Christian and Mike were professional, thorough, patient, and kind throughout my heating boiler installation.
Roger Perry
Always excellent service with McAllister.
Joy Kreves
Robert came to check my 2 carbon monoxide detectors, which were very old. I decided to have him go ahead and replace them with smoke detector/ carbon monoxide combination units. He was very polite and efficient .
Brant Herman
Jihmy and Asterson did an outstanding job and were extremely professional during a recent installation of a mini split and air handler. They communicated well, kept the house clean and did the job with a level of professionalism and expertise that was refreshing.
Bassey Akpan
Good job
r francis
Maurice Gaines who cleaned and serviced my air conditioner was fantastic! He was fast, respectful and very fast with the repairs.

He made me feel like I was getting the full respect and honesty I so needed for something so important and really appreciated the time he took to explain every and answer all my millions of questions. Also Princeton Air communications were fast and accurate , leaving no question unanswered as to timing and confirmation of appointment. I’m so happy with their staff and with Maurice- he’s a gem!
Thank you!
Tom Braun
The young man who came out to fulfill our annual service contract was extremely professional and was very thorough. Although he told us we needed a new ac unit I felt confident that he knew what he was talking about and took the right amount of time in order to make his recommendation. I want him back every year. Unfortunately I forgot his name because I’m old.

He then had Ricky call us with replacement ac unit recommendations. He was just as professional. He then took the time to visit our condo, take measurements himself and then made recommendations on what size unit to purchase. I really feel he saved us money. He was amazing.

We then were contacted by a gentleman named Steve who was a manager in the service and installation department. It’s hard to believe but he was just as good as the first two representatives and was an absolute pleasure to work with. He was a true professional and a real asset to your organization. I will always use your company if I can work with this team. Keep up the great work. Thanks for allowing me to spend $8,000.its hard to believe I didn’t even get other quotes because I was so happy with your team.
Terry Martin
Water purification system
Jimmy Heikes
Recently Princeton Air did a routine maintenance check on our HVAC UNIT. The technician was Dominic McGinley. I must say Mr. McGinley was outstanding. After performing the maintenance and evaluation, he sat down with us and explained his findings in precise detail. He has also taken pictures of everything he found. Dominic was a pleasure with whom to interact. He was professional, friendly, and extremely knowledgeable. He explained everything in terms that we could definitely understand. He is one of the finest technicians that has ever performed preventative maintenance on our equipment. In my estimation he has all of attributes of a first rate Service Technician. Hopefully Princeton Air just what a valuable asset he is for the company. I certainly hope to interact with him many times in the future.
Karyn Gordon
We recently used Princeton Air to install a new heater. They gave us lots of options, explained each one thoroughly, they arrived promptly on installation day and did a great job. The price was the lowest of three companies I contacted for estimates. Five stars!
Amit Rai
Always professional and informative.

Get Pre-Approved Financing

Financing Options

(609) 799-3434

Tankless Water Heater Problems Our Plumbers Handle

Tankless units signal problems through specific symptoms and error codes, and an experienced plumber reads them accurately.

Princeton Air’s licensed plumbers have resolved nearly every tankless failure mode that comes up across Mercer County. The mineral content in much of the area’s water is one reason tankless units in this region need attention a few years in, and our team knows what this water chemistry typically produces in the heat exchanger.

You look at your unit and see a numbered fault code displayed. Every major tankless manufacturer uses code systems that point to specific failure categories: ignition faults, flame rectification issues, venting obstructions, overheat conditions, flow sensor problems, and more. Your plumber interprets the code against your specific manufacturer’s documentation and turns the display into a repair plan.

You turn on hot water and the unit fails to ignite. Ignition failures often trace back to the flame sensor, gas valve, igniter, or the airflow side of the combustion system. Gas pressure problems and blocked combustion air inlets can each prevent the burner from firing. Your plumber tests each element in sequence to identify the specific failure.

You have hot water that cycles to cold mid-shower or can’t maintain temperature at a steady flow. Temperature stability issues on tankless units often indicate scale buildup inside the heat exchanger, flow sensor drift, or modulation problems with the burner. A descaling flush resolves scale buildup, and your plumber identifies whether other components need attention.

You notice ticking, clicking, or pops from your tankless. Some clicking at ignition is normal relay operation. A loud rumble or repeated popping usually indicates scale buildup boiling against the heat exchanger, which is one of the most common issues on tankless units in areas with harder water. Your plumber recommends a descaling service or heat exchanger replacement depending on severity.

You find that running two showers at the same time drops the pressure or temperature more than it used to. Flow restrictions, scale buildup reducing heat exchanger efficiency, or a unit that’s undersized for your actual demand can all produce this. Your plumber distinguishes between a repair situation and a sizing situation and gives you honest guidance.

You see water dripping from the unit or staining the wall below it. Leaks on tankless units come from heat exchanger damage, cracked pipe fittings, or failed isolation valves. Heat exchanger damage is serious and often points toward replacement; other leaks are typically repairable. Your plumber pinpoints the origin of the leak and tells you which category of repair you’re looking at.

Call (609) 799-3434 to schedule a tankless water heater repair.

Questions?

Why Homeowners Choose Princeton Air for Tankless Repair

Tankless equipment rewards a service team that has actually worked on it, because mistakes are expensive.

Princeton Air has built its reputation on repairs that hold up, and tankless work is no exception.

You’re working with a team that has serviced tankless systems across the full range of residential brands and multiple generations of the technology. Our plumbers have seen the common failure modes for each major manufacturer, which means your diagnosis starts from an informed baseline rather than a cold read.

Your tankless repair is handled by a licensed plumber with specific training on tankless equipment. The license is the baseline for plumbing work; the tankless training is what produces repairs that address the actual cause of the problem rather than the first symptom.

Tankless work covers every system the unit depends on: combustion safety, venting integrity, flow sensors, and the descaling that hard water demands. Our plumbers handle each with the attention these components require.

You can call Princeton Air for plumbing work alongside HVAC, electrical, and indoor air quality. Tankless units sometimes involve gas line work, electrical supply questions, or water quality issues that cross into other trades, so one team handles the full scope without handoffs.

Tankless equipment is significant, and older units with major component failures sometimes reach the point where replacement is the better call. Our plumbers walk through that decision with you openly, so what you pay for reflects what actually serves your home.

(609) 799-3434

(609) 799-3434

Full Tankless Services From Princeton Air

Princeton Air supports your tankless system across every stage of ownership.

Repair is one phase of tankless work, and our licensed plumbers handle the rest too.

When you’re upgrading from a tank or installing a tankless water heater for the first time, you receive careful installation including properly sized gas supply, correct venting, and the setup that lets the unit perform at its rated output from day one.

When your existing unit has aged out or taken a failure that doesn’t make sense to repair, you get a clean replacement with a unit sized and configured for your actual household demand.

Your annual tankless service includes descaling, combustion inspection, flow sensor verification, and the other checks that keep your unit efficient and extend its working life. Regular maintenance is the single most valuable thing you can do for tankless equipment.

You can also call Princeton Air for tank water heater repair, replacement, installation, and maintenance if your home mixes equipment types or you’re weighing a conversion between tank and tankless.

Protect Your Comfort Year-Round

Your tankless unit performs longer and better when someone is keeping regular eyes on it.

You can stay ahead of unexpected issues through the Princeton Air Home Comfort Club. Membership gives you pre-scheduled maintenance, priority service, and thoughtful system evaluations that catch small concerns before they become repair calls.

You get reduced rates on service work, credits toward future installations, priority scheduling when you need it, and no dispatch fees when work is performed. Membership extends across HVAC, plumbing, and electrical, so the same trusted team looks after every important system in your home.

Ask about joining the Princeton Air Home Comfort Club when you call or schedule online.

Princeton Air Technician

The Home Comfort Club

Service plan starting at

$49.99/mo

All Service Plans
Princeton Air Technician

We’re Here to Help!

Quality, Friendly Service in New Jersey

(609) 799-3434

Call Princeton Air for Tankless Water Heater Repair

Endless hot water on demand is the whole reason a tankless unit makes sense, and Princeton Air’s licensed plumbers have the tankless expertise to keep yours delivering it. Phone us or submit a service request online today.

Frequently Asked Questions

How often does a tankless water heater need descaling?

You should plan on descaling every 12 to 24 months for most homes in the Princeton, New Jersey area, depending on your water hardness. Households with hard water need more frequent descaling; homes with water softeners can often go longer. Tankless manufacturers generally require descaling for warranty compliance, and neglected units lose efficiency measurably across a single year.

What does my tankless error code actually mean?

Your code is the unit’s self-diagnosis of what it has detected, and each manufacturer uses its own code system. A technician familiar with your brand can read the code against the maintenance manual and translate it into a specific repair. Some codes indicate simple resettable conditions; others point to component failures that require parts.

How long does a tankless water heater last?

A well-maintained tankless unit can deliver 15 to 20 years of service, which is longer than most tank water heaters. Units in homes with hard water that skip descaling often fall well short of that range, while homes that maintain their units consistently tend to reach the upper end. The condition of your heat exchanger is usually the limiting factor.

Is my tankless unit worth repairing or should I replace it?

It depends on the component that’s failed and how old your unit is. A minor repair on a 10-year-old unit almost always makes sense. A heat exchanger failure on a unit more than 15 years old often points toward replacement. Our plumbers walk through the math with you honestly.

Can you service every brand of tankless water heater?

Yes. Princeton Air’s licensed plumbers service the full range of residential tankless brands installed throughout New Jersey, including Rinnai, Navien, Rheem, Noritz, Bosch, and others. Each manufacturer has its own service conventions, and our team is experienced across all of them.