Top-rated tankless water heater repair pros.

Get matched with top tankless water heater repair pros in your area

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Tankless water heater repair pros in Flagstaff

Monark Plumbing Services LLC
1916 N 2nd Street
New on HomeAdvisorNew on Angi
Approved Pro
Monark Plumbing Services LLC
1916 N 2nd Street
New on AngiNew on HomeAdvisor
Approved Pro
1 years of experience
Free onsite estimate

Monark Plumbing Services LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Monark Plumbing Services LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.


Avatar for Collingwood Pump
Collingwood Pump
990 S Alvey Ln
5.00(
2
)
Approved Pro
Collingwood Pump
990 S Alvey Ln
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

"Grateful for the super speedy service and honesty"

Lisa D on December 2022

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

"Grateful for the super speedy service and honesty"

Lisa D on December 2022


Avatar for Goettl's High Desert Mechanical, Inc.
Goettl's High Desert Mechanical, Inc.
4650 Old State Highway 279, Suite A
4.61(
98
)
Approved Pro
Goettl's High Desert Mechanical, Inc.
4650 Old State Highway 279, Suite A
4.61(
98
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
25 local quotes requested

When you call Goettls High Desert Mechanical Heating & Cooling specialist, youre getting a team of experts dedicated to prompt and reliable service. Whether you need installations, duct sealing, geothermal systems or maintenance work and repairs, we pride ourselves on making a positive impression and establishing lasting relationships with our customers. Owners Adam and Ted Goettl have more than 30 years of experience in the HVAC field. They founded Goettls High Desert Mechanical in 1987. And are both certified by the North American Technician Excellence, the leading certification program for heating, ventilation and air conditioning. All of Goettls technicians are NATE certified. Our technicians are skilled and knowledgeable. We listen to your concerns, answer all your questions and discuss your options to help you determine what best meets your needs. And, we take care of your home as if it were our own. Our work is meticulous and tidy and always up to code standards.

"I had good service from previous plumbing repairs but they really messed up on my A/C repair this time. I was 3 weeks without air during one of the hottest periods this year. The first motor that was installed broke the same day it was installed. 7 day wait for another one. The job cost me almost $1100."

Linda s on August 2022

When you call Goettls High Desert Mechanical Heating & Cooling specialist, youre getting a team of experts dedicated to prompt and reliable service. Whether you need installations, duct sealing, geothermal systems or maintenance work and repairs, we pride ourselves on making a positive impression and establishing lasting relationships with our customers. Owners Adam and Ted Goettl have more than 30 years of experience in the HVAC field. They founded Goettls High Desert Mechanical in 1987. And are both certified by the North American Technician Excellence, the leading certification program for heating, ventilation and air conditioning. All of Goettls technicians are NATE certified. Our technicians are skilled and knowledgeable. We listen to your concerns, answer all your questions and discuss your options to help you determine what best meets your needs. And, we take care of your home as if it were our own. Our work is meticulous and tidy and always up to code standards.

"I had good service from previous plumbing repairs but they really messed up on my A/C repair this time. I was 3 weeks without air during one of the hottest periods this year. The first motor that was installed broke the same day it was installed. 7 day wait for another one. The job cost me almost $1100."

Linda s on August 2022


Avatar for Mr. Rooter Plumbing of Yavapai Coconino & Maricopa
Mr. Rooter Plumbing of Yavapai Coconino & Maricopa
248 General Crook Trl
4.50(
178
)
Approved Pro
Mr. Rooter Plumbing of Yavapai Coconino & Maricopa
248 General Crook Trl
4.50(
178
)
Approved Pro
Customers say: Super punctual
391 local quotes requested
16 years of experience

At Mr. Rooter® Plumbing every customer’s individual needs are important. Whether it’s a simple sink clog or a damaged sewer line, you can count on a Mr. Rooter plumber to take care of your plumbing needs – day or night – with never an overtime charge. Our professional service, quality products and honest, up-front pricing make Mr. Rooter the best value in plumbing services nationwide. Mr. Rooter is ready for all emergency plumbing issues, from clogged drains and sewage backups to frozen pipes and leaking water heaters. You can count on an expert diagnosis from Mr. Rooter with our camera inspection tools. Then we’ll fix it right the first time, whether it takes HydroScrub® drain cleaning or trenchless pipe repair, with courteous smiles on our faces. There's a reason they call us Mr.® Call your local Mr. Rooter today.

"I've been using this company off and on for several years. They aren't the least expensive, but I'll tell you, they are the best! I have a vacation rental and a sump pump...not a good combination. Last night, the guest reported sewage backing into the shower and bathtub. I got in touch with Beverly at 8 a.m., and she had someone at the house by 9:30. Beverly has always taken my calls these past few years, and she feels like a family member who is there to help. She is always helpful and talks me off a ledge when I'm stressed about a plumbing issue. Thank you, Beverly! Ryan was my service tech, and, like all their staff, he was prompt, courteous, and professional. He informed me about each step and took pictures to show me what the problem was and the resolution. He handled a disgusting job that almost all people would not touch. They resolved my issue, and my current guest was very happy. Thanks for digging out all the grease that prior guests have dumped down the sink. Not a good combo with the sump pump and plumbing. Happy Holidays to all!"

Aliesha B on December 2024

At Mr. Rooter® Plumbing every customer’s individual needs are important. Whether it’s a simple sink clog or a damaged sewer line, you can count on a Mr. Rooter plumber to take care of your plumbing needs – day or night – with never an overtime charge. Our professional service, quality products and honest, up-front pricing make Mr. Rooter the best value in plumbing services nationwide. Mr. Rooter is ready for all emergency plumbing issues, from clogged drains and sewage backups to frozen pipes and leaking water heaters. You can count on an expert diagnosis from Mr. Rooter with our camera inspection tools. Then we’ll fix it right the first time, whether it takes HydroScrub® drain cleaning or trenchless pipe repair, with courteous smiles on our faces. There's a reason they call us Mr.® Call your local Mr. Rooter today.

"I've been using this company off and on for several years. They aren't the least expensive, but I'll tell you, they are the best! I have a vacation rental and a sump pump...not a good combination. Last night, the guest reported sewage backing into the shower and bathtub. I got in touch with Beverly at 8 a.m., and she had someone at the house by 9:30. Beverly has always taken my calls these past few years, and she feels like a family member who is there to help. She is always helpful and talks me off a ledge when I'm stressed about a plumbing issue. Thank you, Beverly! Ryan was my service tech, and, like all their staff, he was prompt, courteous, and professional. He informed me about each step and took pictures to show me what the problem was and the resolution. He handled a disgusting job that almost all people would not touch. They resolved my issue, and my current guest was very happy. Thanks for digging out all the grease that prior guests have dumped down the sink. Not a good combo with the sump pump and plumbing. Happy Holidays to all!"

Aliesha B on December 2024


Avatar for Evolution Drafting
Evolution Drafting
1185 Utah Ave. Suite 107
3.72(
25
)
Approved Pro
Evolution Drafting
1185 Utah Ave. Suite 107
3.72(
25
)
Approved Pro
Customers say: Terrific value
5738 local quotes requested
7 years of experience

Our firm is a dynamic provider of drafting and house plan services, dedicated to turning your visions into tangible and pleasing structures. With a commitment to excellence, we bring expertise and innovation to every project we undertake. We specialize in comprehensive drafting services tailored to meet diverse client needs. Our offering include: Design: Crafting unique and functional designs that blend creativity with practicality. Drafting Services: Precision and attention to detail in creating accurate and detailed drafts for seamless project execution. 3D Modeling: Bringing designs to life with realistic 3D models that provide a vivid preview of the final structure. Project Management: From concept to completion, we offer end-to-end project management ensuring timely and efficient delivery. Interior Design: Enhancing spaces with innovative interior designs that harmonize aesthetics and functionality. Detail Services Offered: - Building Code Compliance - Construction Documentation - Renovation and Remodeling Plans About our Team: Our team comprises draftsman and project managers, each bringing a unique skill, style and experience to the table. Collaborative teamwork and alliance is at the core of our success, ensuring a holist approach to every project. We take pride in our commitment to delivering high-quality work on every project. Our rigorous quality control measures, pays attention to client requirements, and adherence to industry standards are the cornerstones of our success. Your satisfaction is our top priority and guarantee. At Evolution Drafting, we don't design structures; we create environments that inspire and endure. Work with us and experience the art of living.

"They were very professional to deal with and surprised me how fast they finished the job. They took my vague vision for my project I gave them and brought it to life in a way that exceeded my expectations! Will definitely use them again in the future."

ISAIAH B on June 2025

Our firm is a dynamic provider of drafting and house plan services, dedicated to turning your visions into tangible and pleasing structures. With a commitment to excellence, we bring expertise and innovation to every project we undertake. We specialize in comprehensive drafting services tailored to meet diverse client needs. Our offering include: Design: Crafting unique and functional designs that blend creativity with practicality. Drafting Services: Precision and attention to detail in creating accurate and detailed drafts for seamless project execution. 3D Modeling: Bringing designs to life with realistic 3D models that provide a vivid preview of the final structure. Project Management: From concept to completion, we offer end-to-end project management ensuring timely and efficient delivery. Interior Design: Enhancing spaces with innovative interior designs that harmonize aesthetics and functionality. Detail Services Offered: - Building Code Compliance - Construction Documentation - Renovation and Remodeling Plans About our Team: Our team comprises draftsman and project managers, each bringing a unique skill, style and experience to the table. Collaborative teamwork and alliance is at the core of our success, ensuring a holist approach to every project. We take pride in our commitment to delivering high-quality work on every project. Our rigorous quality control measures, pays attention to client requirements, and adherence to industry standards are the cornerstones of our success. Your satisfaction is our top priority and guarantee. At Evolution Drafting, we don't design structures; we create environments that inspire and endure. Work with us and experience the art of living.

"They were very professional to deal with and surprised me how fast they finished the job. They took my vague vision for my project I gave them and brought it to life in a way that exceeded my expectations! Will definitely use them again in the future."

ISAIAH B on June 2025


Avatar for Lizardi Construction
Lizardi Construction
4.20(
15
)
Approved Pro
Lizardi Construction
4.20(
15
)
Approved Pro
2111 local quotes requested
13 years of experience

We specialize in general remodel services and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"It went well."

Chris P on August 2024

We specialize in general remodel services and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"It went well."

Chris P on August 2024


Avatar for Neli Virtual Appliance Repair
Neli Virtual Appliance Repair
143 Charlotte Ave
4.29(
573
)
Approved Pro
Neli Virtual Appliance Repair
143 Charlotte Ave
4.29(
573
)
Approved Pro
Customers say: Super punctual
59312 local quotes requested
9 years of experience

Virtually diagnose and/or repair your appliances and HVAC units today without anyone stepping foot inside your home! Starting at $45 you can take control of your home appliance repairs via video chat with a certified technician when it’s convenient for you. Make an appointment today on our website. Neli's certified technicians will work with you to conduct either a diagnosis to find out what's wrong or a repair. You will use Neli’s advanced video chat technology during your appointment. Schedule your appointment today at nelihome.com or call us at 833-876-0900!

"They did fine"

Keavon R on May 2025

Virtually diagnose and/or repair your appliances and HVAC units today without anyone stepping foot inside your home! Starting at $45 you can take control of your home appliance repairs via video chat with a certified technician when it’s convenient for you. Make an appointment today on our website. Neli's certified technicians will work with you to conduct either a diagnosis to find out what's wrong or a repair. You will use Neli’s advanced video chat technology during your appointment. Schedule your appointment today at nelihome.com or call us at 833-876-0900!

"They did fine"

Keavon R on May 2025


Mountain Country Builders, Inc.
1798 W. University Heights Dr. South
5.00(
5
)
Mountain Country Builders, Inc.
1798 W. University Heights Dr. South
5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Mountain Country Builders is an award winning full-service Design/Build General Contractor serving Flagstaff and surrounding communities since 1988. Mountain Country Builders is committed to provide our clients the highest degree of satisfaction through trustworthy and reliable service while utilizing organized and efficient systems to produce quality design/build projects. Our "Five-Steps to Project Success and Client Satisfaction" ensure that your remodeling or new home project will be a rewarding and pleasant experience. Owner, Randy Sealover, has over 30 years of project field experience and will personally guide his clients and coach his team of Trade Contractors through your project.He has established long- term relationships with product and material suppliers, as well as experienced, licensed, and insured Trade Contractors. Randy has always strived to be the best General Contractor he can be by being actively involved in industry affiliations and education.Please check-out our website so we can get started on your project today! 1798 W. University Heights Dr. South Flagstaff, AZ 86005

Mountain Country Builders is an award winning full-service Design/Build General Contractor serving Flagstaff and surrounding communities since 1988. Mountain Country Builders is committed to provide our clients the highest degree of satisfaction through trustworthy and reliable service while utilizing organized and efficient systems to produce quality design/build projects. Our "Five-Steps to Project Success and Client Satisfaction" ensure that your remodeling or new home project will be a rewarding and pleasant experience. Owner, Randy Sealover, has over 30 years of project field experience and will personally guide his clients and coach his team of Trade Contractors through your project.He has established long- term relationships with product and material suppliers, as well as experienced, licensed, and insured Trade Contractors. Randy has always strived to be the best General Contractor he can be by being actively involved in industry affiliations and education.Please check-out our website so we can get started on your project today! 1798 W. University Heights Dr. South Flagstaff, AZ 86005


Country Handyman llc
7630 E Long Bow Dr
No reviews
Country Handyman llc
7630 E Long Bow Dr
No reviews
24 years of experience

Build it, fix it, or remodel it, I can do it all! A one man show that has been doing this my whole life. From growing up on a farm to running a business of various services, I've been "in the business" of building, fixing, and/or maintaining anything and everything that has to do with a home. All jobs figured on my hourly rate, with a one hour minimum. No "set fees" regardless of time. (many companies do this KNOWING that they can get things done quickly, thereby making over $100/hr. on some jobs) I've built decks, garages, homes, and additions. I've remodeled kitchens, baths, basements, and virtually every room in a home. I've ran equipment, developed roads, driveways, and fixed drainage issues. I've replaced water heaters, faucets, dishwashers, washers and driers. Doors, windows, pet doors, and skylights are familiar to me. Various kinds of fencing, gates, and pet containment. If it has to do with home repair, maintenance, and/or improvement chances are I've done it. Give me a call and see what I can do for you.

Build it, fix it, or remodel it, I can do it all! A one man show that has been doing this my whole life. From growing up on a farm to running a business of various services, I've been "in the business" of building, fixing, and/or maintaining anything and everything that has to do with a home. All jobs figured on my hourly rate, with a one hour minimum. No "set fees" regardless of time. (many companies do this KNOWING that they can get things done quickly, thereby making over $100/hr. on some jobs) I've built decks, garages, homes, and additions. I've remodeled kitchens, baths, basements, and virtually every room in a home. I've ran equipment, developed roads, driveways, and fixed drainage issues. I've replaced water heaters, faucets, dishwashers, washers and driers. Doors, windows, pet doors, and skylights are familiar to me. Various kinds of fencing, gates, and pet containment. If it has to do with home repair, maintenance, and/or improvement chances are I've done it. Give me a call and see what I can do for you.


R&R FLOORING
25194 W. Fremont Dr
5.00(
3
)
R&R FLOORING
25194 W. Fremont Dr
5.00(
3
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Floor covering licensed in commercial and residential we specialize in wood floor laminate glue down nail down and bamboo I have a 2 man crew all of which passed extensive back ground checks. We also specialize in tile and travertine flooring we are the one stop shop for all floor covering except sheet vinyl and carpet we can beat any price on materials and we take great pride in our work and being in your home is a luxury not a job we don't look at your flooring project as a job we look at it as part of the family and we will do whatever it takes to make a customer 1000% satisfied so please if you want a quality job and the best prices in town let R&R Flooring be your flooring professionals and we can assure you that your project will be a luxury not a choir for you stress free is what we aim for give us a call at 623-313-1622 ask for ryan

Floor covering licensed in commercial and residential we specialize in wood floor laminate glue down nail down and bamboo I have a 2 man crew all of which passed extensive back ground checks. We also specialize in tile and travertine flooring we are the one stop shop for all floor covering except sheet vinyl and carpet we can beat any price on materials and we take great pride in our work and being in your home is a luxury not a job we don't look at your flooring project as a job we look at it as part of the family and we will do whatever it takes to make a customer 1000% satisfied so please if you want a quality job and the best prices in town let R&R Flooring be your flooring professionals and we can assure you that your project will be a luxury not a choir for you stress free is what we aim for give us a call at 623-313-1622 ask for ryan

...
Showing 1-10 of 185

FAQs for tankless water heater installation projects in Flagstaff, AZ

Professional flushing services for tankless water heaters run about $200 per visit. This essential maintenance procedure eliminates mineral deposits from critical components, particularly the heat exchanger. While homeowners can purchase DIY flushing kits for $50 to $100, professional service offers the advantage of thorough cleaning with proper techniques. Professional maintenance also includes inspection of additional components that might need attention.

Industry experts and manufacturers recommend annual maintenance for tankless water heaters, with more frequent service (every six months) for homes with challenging water conditions. This regular attention prevents efficiency losses and extends the unit's operational lifespan. Watch for warning signs like reduced water temperature, inconsistent performance, or system error codes that might indicate maintenance is needed sooner than scheduled.

Neglecting regular maintenance allows mineral scale to accumulate within your system, restricting water flow and reducing heating efficiency. This forces your unit to work harder, consuming more energy while delivering less satisfactory performance. Over time, this strain can lead to component failures, inconsistent water temperatures, and premature system replacement. Additionally, most manufacturers require documentation of regular maintenance to honor warranty coverage for major components.

Share project details to get started.