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Plumbing, Heating, Cooling & Electrical Experts

Tankless Water Heater Repair in Worcester, Middlesex & Norfolk Counties

A sudden loss of hot water can throw off your entire day, leaving you with cold showers and unfinished chores. When your tankless water heater begins to malfunction, you might notice irregular temperatures, fluctuating pressure, or error codes that point to system failure. Ignoring these early signs can lead to expensive water heater repairs or even complete system replacement, impacting both comfort and efficiency.

Landry Mechanical Inc Plumbing HVAC & Electric offers reliable tankless water heater repair and routine service to restore your system’s performance quickly. Our licensed plumbers handle diagnostics, repairs, and maintenance for all brands, ensuring long-lasting efficiency and consistent hot water throughout your home. We proudly serve homeowners with 24/7 emergency service and dependable plumbing solutions you can trust.

A tankless water heater installation with visible copper piping, intake, and exhaust systems, mounted on a blue panel in a home's utility area.

Tankless vs. Traditional Water Heaters

Traditional water heaters store and continuously heat a large tank of water, keeping it ready for use at all times. This design is convenient but less efficient since it wastes energy maintaining water temperature throughout the day. Tankless systems, on the other hand, heat water on demand, providing endless hot water without the need for storage. They take up less space, last longer, and can help lower utility costs over time. For homeowners considering an upgrade, Landry ensures proper installation and maintenance to get the most from your investment.

Landry’s Tankless Water Heater Services

Maintaining a reliable hot water system is essential for everyday comfort and home efficiency. Landry Mechanical Inc Plumbing HVAC & Electric provides a full range of tankless water heater solutions. From minor fixes to complete installations, our licensed plumbers deliver lasting results that keep your home running smoothly.

Repair and Troubleshooting

If your unit isn’t producing steady hot water or shows an error code, our team will inspect and repair the problem quickly. We address common issues like clogged filters, ignition failures, and fluctuating temperatures to restore your system’s performance. Each repair is completed with precision to ensure consistent results and dependable operation.

Installation and Replacement

Upgrading to a tankless system can help reduce energy use while providing endless hot water on demand. Our plumbers recommend and install high-quality models suited to your home’s water needs and layout. Every installation is carefully tested for efficiency, safety, and long-term reliability.

Routine Maintenance

Regular service is the best way to protect your system from scale buildup and costly malfunctions. During our Landry tankless water heater service, we flush the heat exchanger, inspect the venting, and verify the system’s flow rate. Preventive maintenance helps extend the lifespan of your water heater and ensures consistent comfort year-round.

Need fast help with plumbing, heating, AC, or electrical? Call or schedule service today!

Why Homeowners Choose Landry Mechanical

When it comes to hot water solutions, homeowners trust Landry Mechanical for quality service and dependable results. Our technicians combine years of hands-on experience with advanced diagnostic tools to deliver precision repairs and installations every time. From emergency calls to routine tune-ups, we make sure your comfort and convenience always come first.

  • 24/7 Emergency Availability: We’re ready to help at any hour so you never have to go without hot water when your system breaks down unexpectedly.
  • Certified Technicians: Our licensed plumbers are trained to service all major brands and models with accuracy and care.
  • Transparent Communication: We provide upfront pricing and clear explanations, so you know exactly what to expect at every step.
  • Efficient, Lasting Solutions: Each repair or installation is performed with attention to detail, ensuring consistent performance and energy savings.

Get Back to Reliable Hot Water Today

If your tankless system is acting up or you’re considering an upgrade, Landry Mechanical Inc Plumbing HVAC & Electric is ready to help. We provide prompt tankless water heater repair and professional servicing to restore comfort quickly. Contact us today to schedule your appointment and enjoy worry-free hot water again. Check out our customer reviews to see why families continue to choose Landry Mechanical for their plumbing needs.

Flow into Savings

$100 OFF

Tank Type Water Heater Installs

or Save $250 on Tankless Water Heater Installs

Disclaimer: Offer Must Be Presented At Time of Sale. Offer Valid for $100 OFF Tank-Type Water Heater Installs or $250 OFF Tankless Water Heater Installs. Discounts are for completed installations only. Discounts do not apply to dispatch fees. Cannot Be Combined With Other Offers. Some Exclusions Apply. Valid 7/1/2026-7/31/2026 Expires: Aug 31, 2026

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Hear From Our Satisfied Customers

With Landry there's no guessing when the repair people will show up. Always on time and excellent work.
randy kolodziej.
22 hours ago
UPDATE 11Aug2026:
The Landry team came to my house for the annual plumbing, HVAC, and electric servicing.
Anthony, Randy, and the other person with him (I don't remember his name, sorry) were fantastic - they showed up on time, did thorough reviews of the electric systems and plumbing and gave sound recommendations for improvements and fixes.
Tory performed the HVAC system service and she was amazing. She spent a considerable amount of time checking the system and found leak that needs to be repaired. I cannot recommend this team enough!

Landry Mechanical is the best! We used them to replace our entire HVAC system and we couldn't have asked for a more professional, friendly, knowledgeable, and diligent team. They made sure everything went perfectly from start to finish. Katie is the most incredible point of contact- she patiently answered the multiple questions i had. She also helped me with the Mass Save rebates. The techs who came to our house were polite, friendly, patient, and did a fantastic job installing our system. It’s perfect. Landry will be my "go-to" company from now on. I cannot say enough good things about this company. I highly recommend them!

October 14, 2022 - Landry was once again called to fix broken spigots on the outside of my house. Paul fixed those and also found a pipe that would have burst had he not replaced it when he did. Not only did Paul go above and beyond repairing what I had requested he originally fix, he ALSO found that my dryer vent was incorrectly installed, which would have resulted in my house eventually catching fire. Paul saved my house from both eventually flooding and/or burning down, thus literally saving my family's life. Again, I cannot recommend Paul and Landry enough!
Alison O'Loughlin
1 day ago
We had one of their electricians, Mike, at our house to figure out why the ceiling fan would go faster while the water kettle was on and how that made the aquarium lights in the next room flicker. Also needed two new 50A circuits installed, a ghost 40A (hot, hidden in a wall) terminated and additional 20A circuits installed in the kitchen. Mike did excellent trouble shooting, fixed the problems and gave us a quote for the whole job same day with work done next day. We have a 1951 industrial install in private residence situation that multiple electricians have simply walked away from. Sometimes you are just grateful that someone is capable, does what it takes and not more and gets it done. Largest part of the quote was wire and parts…
David Grunwald
1 day ago
Andrew explained so.. much today regarding my steam boiler. Learned alot today.
Thanks Andrew!
Kathy Sundstrom
1 day ago
Very quick to respond. Professional, clearly explained my options and promptly fulfilled my choices.
Thank you Eric!
kathi rose
1 day ago
Great and timely work by professionals. Would highly recommend.
Vignesh Vittal Srinivasaragavan
1 day ago
I had Evan Schwartz help with a small problem with my indoor mini split, which was intermittently leaking water all over the wall. He identified the problem, walked me through what it would take to fix it, and got it sorted in under an hour. No more leak! He was a total professional and I will be coming back to Landry again for my other plumbing and HVAC needs in the future!
Bryan Scott
2 days ago
Evan did a great job today fixing our AC. Diagnosed the issue quickly and repaired it. Answered all our questions. He was very professional.
Michelle Muscatell
3 days ago
Evan was fantastic! We couldn’t have asked for a nicer or more professional engineer. He went and beyond in making sure our air conditioning unit was up and running in the sweltering heat! He was a pleasure to work with and very attentive. Thank you
Jakub Pach
3 days ago
Competent, responsive, good value for money. Nice people.
John Mordes
5 days ago
I had my water filtration system serviced.Jose and Matt were knowledgeable, efficient and pleasant. They also checked the plumbing throughout the house. Good experience.😀
Lois Benotti
5 days ago
No long automated answering machine. Spoke to a knowledgeable advisor and contracted with DiLeo.
Fred Hirbour
6 days ago
This is the second time I’ve used Landry Mechanical, and both times I have been impressed with the service and with personnel. On this occasion we had a plumbing issue, Randy and Alex arrived two hours after I called, and both were excellent! They found the problem, fixed it right away, and gave me options and cost estimates so I could select what was best for me.

I would give Randy and Alex more than five stars if I could!! I would use them again without a doubt.
Michael Gusar
6 days ago
Evan and Tory were out to do repair of our AC unit. Both were friendly, knowledgeable and conscientious.
I would definitely recommend this company for HVAC services.
Linda Chartrand
6 days ago
I had scheduled a couple of jobs with Landry. Mikey came out and worked on my electrical, and went above and beyond to explain what he was doing and what was needed. Drew came later and was excellent - knowledgeable and patient on HVAC. Later, I had a leak (unrelated and unexpected!) and placed an emergency call to Landry. They dispatched Randy and Ricky, who worked hard to find the source of the leak and fix the problem.
I would not hesitate to use Landry again - each of the techs that came out were professional, knowledgeable, and personable.
Lisa Glassman
6 days ago
Landry Mechanical Associates did an excellent job during my annual maintenance checkup. Jose Viveiros and Anthony were knowledgeable, courteous, and professional. They clearly explained everything they were doing, provided a detailed list of recommended repairs with priorities, and followed up with a thorough summary email that gives me a clear plan moving forward. Thank you!
Patricia Leddy
1 week ago
I had a tremendous experience with my mini splits installation. JT, Marcus, Donny and Dimitri were great. They arrived on time, were friendly, made sure to clean up after themselves and worked very efficiently. JT and Marcus were even kind enough to remove the 3 window AC units for me and bring them down to the basement after the installation of the mini splits was complete. I’ve used Landry for a long time for many different services, and there’s a reason I keep coming back! They always do excellent work.
Ryan Mohamed
1 week ago
Owning an older home means repairs are just part of the deal. Over the years, I've called Landry Mechanical several times, and they've consistently done excellent work. Their team is licensed, knowledgeable, professional, and easy to work with.

Most recently, Hunter and Austin replaced a faucet, cleared a couple of slow drains, and installed new kitchen sink baskets. They were efficient, courteous, and did quality work.

If you own an older home, it's worth having a company you can trust. I highly recommend Landry Mechanical.
AJ Sullivan
1 week ago
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    When you need AC, heating, plumbing, or electrical repairs and replacements, call Landry Mechanical Inc Plumbing HVAC & Electric or book online for appointments in Millbury, MA, and throughout Worcester, Middlesex, and Norfolk Counties.