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Find Water heater repair or service pros in Gaithersburg

Avatar for Fred and Son Plumbing
Fred and Son Plumbing
5.0(
62
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 1990

Free estimates

Customers say: Quick response

"Service was completed as expected. Fred came with his son promptly in the morning. He first assessed the issue and made a recommendation for the repair. The work seems to be of good quality. Final price was just as quoted. Fred was very professional and quite personable. Overall I’m happy with their work and excellent customer service. Highly recommended! I will going to Fred for my future plumbing needs."
Recommended by100%of homeowners
Avatar for TriState Home Services
TriState Home Services
4.7(
181
)

Serving Gaithersburg, MD and surrounding areas

Approved (Corporate)

In business since 1949

Free estimates

Emergency services offered

"Brad was great explaining everything from the work that needed done to the heat pump units themselves. I liked that he called prior to his arrival with an ETA . Did do a free estimate with us. We decided not to go with Tristate in the end and went with a small local business instead but Brad was super friendly and helpful."
Furnace Tune Up
Floor Heating System
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+2

Response time1 day
16 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Remedy Plumbing and Drain Cleaning
Remedy Plumbing and Drain Cleaning
4.9(
64
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"Mr. Rema arrived on time Sunday morning to update my water heater. He installed an expansion tank, duct work and replacing the piping to the thermostat on the water heater. He did an excellent job and took his time. Mr. Rema also went to the local hardware store twice to pick up the material that was needed. The only reason I didn't give him an A was because he quoted me a price at the beginning and then went done on the price and then tried to go back up to the original quoted price. After talking with him he decided to keep the price at the lower amount that he quoted."
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1 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for DAY & NIGHT PLUMBER LLC
DAY & NIGHT PLUMBER LLC
4.9(
85
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"We needed a water heater replacement due to a leak in our existing unit. The company came out promptly after our phone call, provided an estimate, and came back first thing the next morning with a new water heater to install. The owner and staff were patient in answering any questions that we had and did an amazing job cleaning up after they were finished with installation. They went above and beyond to ensure that we were very satisfied with their service. They never made us feel as if they were rushing to complete the job. We would highly recommend them!"
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+1

Response time10 hrs
1 neighbors recently requested a quote
Recommended by98%of homeowners
Markool Heating & Cooling, LLC
4.7(
17
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"Was looking for a company to service/maintenance. Called them and shared my concerns. Scheduled and appointment within 3 days. Technician was polite and professional. Could tell he knew about AC unit and his profession. Fair cost/pricing Highly recommend."
Response time1 day
17 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Jimmy Gusky Heating & Air LLC
Jimmy Gusky Heating & Air LLC
4.5(
323
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 1996

Emergency services offered

Credit card accepted

"Jimmy Gusky HVAC is truly as good as it gets. One of our AC units went down and through the warranty company found our way to Jimmy Gusky himself. Although out of their territory, Jimmy was willing to make the extra trip to diagnose the problem. He was very responsive to get our initial service call scheduled and determined the unit needed to be replaced, and we all know these units usually decide to break down only when pushed to the limit in the hottest summer months and we need AC the most. He did the legwork to get the warranty company to honor the recommendation and as you can see from the attached photo put in a much more substantial unit that is doing a fabulous job cooling the home. Add to that he actually had the unit and scheduled the install even before the warranty company approved the swap out. I that isn't one of the greatest examples of outstanding customer service and going above and beyond to exceed expectations, I don't know what is. Big thanks to Jimmy and team for their commitment to excellence!"
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Response time9 hrs
6 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for McCarthy Services MD
McCarthy Services MD
4.5(
321
)

Serving Gaithersburg, MD and surrounding areas

Approved (Corporate)

In business since 2000

Free estimates

Emergency services offered

"Mr. Brian Langford made all the arrangements with the installation of our gas hot water heater from Lowe's via McCarthy plumbing. He was extremely helpful,patient, professional and available to answer all questions. Due to his approach to his work, we will be working with both companies in the future. Only concern I have is the warranty between Lowe's and AO Smith Hot water heaters. Once the heater is installed, Lowe's severs ties. If there is a problem with the hot water heater, you cannot return it to Lowe's although it was purchased through them, this is clearly stated on the Hot water heater in bold writing."
Installing a new A/C system.
Recommended by88%of homeowners
Joseph plumbing & drain
4.9(
129
)

Serving Gaithersburg, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"Excellent job! Highly recommend Kap! He was available when I needed him. Gave me an excellent price. Made an extra repair that another plumber said would cost another $100 or more to correct with my under counter, extra large sink and Kap didn't charge me extra than the quoted price. His way of fixing it was a far less invasive and time consuming solution! It was perfect. Very professional and personable from the beginning to the end. I will definitely recommend them to friends and I will use him again!"
Response time6 hrs
Response rate99%
6 neighbors recently requested a quote
Avatar for HPC Services
HPC Services
4.8(
19
)

Serving Gaithersburg, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"The office called me within 10 minutes of adding my request on Angi. There were able to come out same day and fix our drain. They also provided me with free plumbing inspection of the rest of the home. Zach was very profession and easy to work with. I would use them again."
installing a boiler refractory blanket, and cleaning inside of boiler
installed straight ac unit
rooftop package units
replacing a heat exchanger on an rtu
past work

+12

20 neighbors recently requested a quote
Recommended by73%of homeowners
Showing 1-10 of 20
FAQs for water heater repair or service projects in Gaithersburg, MD

Warning signs include fluctuating water temperatures, a pilot light that repeatedly goes out, unusual noises from the tank, or complete heating failure. You might also detect a rotten egg smell, indicating a potential gas leak, or notice water that never reaches the proper temperature. If your water heater is over eight years old and displaying these symptoms, the gas valve is a likely culprit. Professional inspection is recommended, especially if gas odors are present.

Water heater gas valves are not universally interchangeable. Each valve must match your specific water heater's make, model, and specifications. Important compatibility factors include gas type (natural gas vs. propane), BTU rating, connection types, and physical dimensions. Using an incorrect valve can result in poor performance, premature failure, or dangerous gas leaks. Always consult your water heater's documentation or a professional plumber to identify the appropriate replacement valve for your unit.

The Gaithersburg, MD homeowners’ guide to water heater repair or services

From average costs to expert advice, get all the answers you need to get your job done.