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Top-Rated Tankless water heater repair pros in Issue - Updated Nov 2026

Avatar for McCarthy Services MD
McCarthy Services MD
4.2(
384
)
Tankless Water Heater - Repair

Serving Issue, 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 by87%of homeowners
Avatar for Orbit Water Solutions
Orbit Water Solutions
4.8(
44
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"We purchased a house and adding a whole house water filter was on our list. Our local Orbit dealer performed a free water test and confirmed a that a lot of the junk we had read was in our city water was in fact there. Our previous house also had hard water and we saw firsthand what it did to our pipes and hot water tank. Plus we were tired of a filtered water pitcher taking up space in our refrigerator. Our sales person went over all of the features of the Puronics 7000 system and outlined the maintenance which simple and easy to understand. Installation took place about two weeks later and the guys were done in a day. About a year out and we're still very happy with the improved water quality and the system itself works great."
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+9

Recommended by97%of homeowners
Avatar for American home services
American home services
4.8(
120
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

In business since 2005

Free estimates

Warranties offered

"We originally found AMS via Angie's List, and the owner came out very quickly to do a free inspection and talk to use about everything he was seeing -- high potential for mold within the walls of the shower, and other possible areas (on drywall of opposite side of walls, floor, etc.) He showed us all readings on the tools he was using, talked to us in detail about what he recommended -- namely, complete destruction of the tile-walled shower due to multiple instances of bad grout (old shower) and the resultant mold problem within the walls as well as on the floor of the shower. He also recommended some touch-up painting with anti-mold paints where water spotting occurred on our main level ceiling, rather than a more complex/expensive and in his view unnecessary ceiling patch. His crew was excellent, keeping things very clean and on schedule and luckily no major issues were found besides demolishing just the existing shower and raising up the old linoleum flooring followed by completely painting all exposed areas with Aftershock anti-mold primer paint to minimize problems in the future. He stayed at the estimate of about $3K for this work as agreed. (I eventually put in a new shower and floor myself.) For his second visit, he came out for another free inspection of some mold exposed in a main level bathroom ceiling when some plaster that had been wet down a few years ago when doing some cleaning broke away. This was a very small mold spot, and had a companion of some other mold shadowed behind wallpaper. AMS did another free inspection of this problem for me today, and advised that it was something I could definitely handle myself - ceiling and walls were bone-dry all around the area and it would be simple to just remove a patch of the wallpaper (which we plan to remove in this room anyway), scrub the mold with appropriate cleaner, re-plaster the small area of the ceiling that would need it, and then paint with Aftershock primer paint. He even gave me recommendations on places to get all my materials, including the brush I would need to match the existing ceiling texture. Even when I offered to pay for the inspection, he refused -- just asked me to write up a couple reviews, which I'm happy to do. I'm the type of person that likes to find high-quality businesses to form relationships with. As much as no one wants to use a mold remediation service, I would definitely call AMS again if I need to."
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+25

Recommended by97%of homeowners
Avatar for DryMount Air LLC
DryMount Air LLC
5.0(
11
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"Excellent company! My water heater stopped working on New Years Eve. Unfortunately, the water heater is behind my HVAC, so they had to remove the HVAC, remove the old water heater, install the new heater, and replace the HVAC. They did a perfect job. They also replaced the freon in my HVAC, because the prior repairmen didn’t add freon. In addition, they fixed the jets in my spa. The team arrived on time, displayed professionalism, and cleaned up afterwards. I would definitely hire them again."
Heating & A/C Project
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Recommended by100%of homeowners
Avatar for National Water Service Corp
National Water Service Corp
4.6(
114
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

In business since 1979

Free estimates

Emergency services offered

"I thought the quality work was very good. They were on time. They diagnosed the problem quickly. I just love that they gave a nice service. I haven't experienced any problem. They go out of their way to get the parts needed for repairs."
Water Treatment, water softener, solution feeder, constant pressure well pump system
Tankless Water Heater
Whole House Water Treatment with Twin PFA/PFOAs remediation filters
Installing a new well line from the well to the house
Tankless Water Heater and Traditional Water Heater

+31

Recommended by92%of homeowners
Avatar for Jerry's Plumbing and Heating Co.
Jerry's Plumbing and Heating Co.
4.3(
95
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"Our service technician was David. He arrived earlier than expected and went straight to work. Our new pump was installed in less than one hour. We were pleased with the work. He came after hours 6:30pm and did not charge an exorbitant fee. He was pleasant and very informative when asked questions. If there was a topic he was not familiar with he answer "I'm not sure". I like reliable companies with professional employees. We had another plumber come earlier and wanted to charge us $452 dollars for a 1/2 HP pump that cost on average $242, $200 for accessories for installation (I paid $276 taxes included for pump and accessories), labor charge to go and pick up the pump and to install the pump. His price $1252. I was told that it was considered an emergency so that is why the price was so high. This was the morning two days after the flood. After we got the pump we called several times and no response as of yet, He's off my list completely. I share this illustration so that buyers can make educated decisions about how best to spend their money. I don't assume that the plumber whose charges were 50% higher than anyone else I called on Angies List. I simply say do your homework and know what is considered a fair price. Thank you Jerry's Heating and Plumbing. You do excellent work in a timely fashion!"
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Recommended by84%of homeowners
Avatar for Magnolia Plumbing Heating & Cooling
Magnolia Plumbing Heating & Cooling
3.9(
210
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

In business since 1950

Emergency services offered

Credit card accepted

"At 7pm on Saturday the 15th, In the middle of the Presidents` Day holiday, the value on my tenant’s apartment radiator started to leak at the rate of 1/2 c every half hour. My house, and the radiator, is 111 years old. I frantically called two 24 hour emergency plumbers and none of them came through. I then called Magnolia, who I had never used before, and Jose Vilche came to my house 40 minutes later. He had to drain the radiators and shut off the water flow as he could not remove the valve, but about 8:20 the next morning he arrived with his assistant, Angel, to cap that radiator and refill the system. He returned on Tuesday, as I had to work on Monday, with his supervisor who was finally able to remove the valve. The radiator stays capped until Tuesday the next week (accommodating my work schedule) when Vincent and Angel install the new valve. I had them also install a new drain valve on a second apartment radiator. So now, after all the draining and bleeding and testing for water balance, the radiators are functioning better than they ever had before. While Magnolia is not inexpensive, the cost was definately worth my peace of mind. Jose was in constant contact with me, he arrived exactly on schedule, explained each step along the way and worked diligently on my horrible problem until it was resolved. Thank you Magnolia- this was a stressful time for me and I was very satisfied with the service I had received!"
We are there when you Need us the Most
Can Do. Will Do. Well Done~ Guaranteed
Fall Specials
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Magnolia Plumbing, Heating & Cooling

+8

Recommended by72%of homeowners
Avatar for Constantly Running Plumbing
Constantly Running Plumbing
4.6(
16
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

In business since 2008

Credit card accepted

"We've used Constantly Running for plumbing issues such as fixture replacements and pipe leaks and have been very satisfied with work performed by James Russell, proprietor, and his staff.  We'd had them out to install a new garbage disposal and snake a slow bathtub drain.  While cleaning out the drain James discovered that there was a small hole in the drain pipe that had been covered by accumulations of debris that once removed, allowed water to drain through the hole onto the ceiling of the room below.  In conversations about the state of the bathroom in general, we'd mentioned that it was our intention at some point to have the bathroom renovated. They had to return to replace the defective portion of drain pipe and repair the ceiling of the room below and while they were working, James offered to renovate the bathroom at a price that sounded eminently reasonable.  I wasn't aware that this was a service he offered, but since we've always been impressed with his work, we decided to go ahead with the project.  At first glance if looked straight-forward, in term of removing old wall and floor tile and replacing it, as well as the tub enclosure and the vanity.  It turned out to be a larger project, as the all the walls and flooring need to be taken down to the wood frame.  The walls and flooring were replaced, and new tiles, fixtures and paint that we had chosen and purchased were installed.  The craftmanship was exemplary.  James and his staff were totally competent, eminently courteous and friendly, and the job was done in a timely manner.  The renovation turned out better than we had ever thought possible, and we are very happy to have been able to work with him, and hope to do so again with another bathroom.
"
Recommended by93%of homeowners
Avatar for Kelly Plumbing & Heating
Kelly Plumbing & Heating
4.5(
84
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"This is really a great company. Super-responsive, fair prices, and, most importantly, quality work done by knowledgable and hard-working folks. I initially called about a leaky kitchen faucet and the owner contacted me right away and was at my house within the hour. He diagnosed my problem immediately, recommended a solution, gave me a reasonable estimate, and said it would be taken care of that day. I was so impressed that I decided to ask for a quote on replacing an aging sump pump and water heater. I wound up having those replaced as well. They also installed a frost-free spigot in front of the house when I mentioned the issues I was having with the ancient "vacuum breaker" that sprayed water everywhere and that I simply could not remove myself. Now flash-forward to 2 weeks later: I detected a water-stain on my living room ceiling which I deduced was probably coming from an upstairs toilet. I called after hours and left a message describing the problem. The owner called me early the next morning and sent sent somebody out immediately. The issue was determined to be a deteriorated "wax ring". Rather than doing a repair, I decided-- at no urging from them-- to have both of the 30-year old toilets in my house replaced with new units. The job was done quickly and professionally in just a couple of hours. Few things are as stressful to homeowners as plumbing and water-related issues. However, it is a relief to know that there are competent, responsive professionals out there like Kelly that you can turn to when the need arises."
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+2

Recommended by89%of homeowners
Avatar for 7247 plumbing
7247 plumbing
4.6(
19
)
Tankless Water Heater - Repair

Serving Issue, MD and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"Mr. Lee was easy to work with. He knew exactly what was needed to get the job done after looking at what he was working with. I needed to have a new shower drain and 2 inch PVC pipe installed after I removed the previous 15 year old leaking drain. I knew the next steps needed to be done by a professional. Glad to have found him and his expertise. I would definitely recommend this service."
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Recommended by100%of homeowners
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