Top-rated tankless water heater repair pros.

Get matched with top tankless water heater repair pros in Crystal Lake, IL

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.

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

Avatar for Aqua Knight Plumbing Co.
Aqua Knight Plumbing Co.
5.0(
16
)
Tankless Water Heater - Repair

Serving Crystal Lake, IL and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

With 24 years of experience we are dedicated to providing our clients with the very best in service, installation, and repairs for all phases of your plumbing needs. We specialize in a variety of residential and commercial services from water heater installations, sewer main installations, sump pump installations, repairs and so much more! We take pride in the attention to detail put into each of the projects \nwere involved with. Were known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction. \n \nAll Work Is Warrantied - Inquire Within \n \nMilitary Veteran and First Responders Discounts Available - Inquire Within \n \nDeposits May Be Required - Inquire Within \n \nAccepts Cash, Checks & Major Credit Cards \n \nFinancing Options Are Available - Inquire Within \n \n24/7 Emergency Services Available \n \naquaknightplumbing.com

New Sump Pit
Outside Clean Out
Outside Clean Out
March 2026
July Clog Log

+169

5 neighbors recently requested a quote
Recommended by31%of homeowners
Avatar for Toptec Heating, Cooling, Plumbing & Electrical, Inc.
Toptec Heating, Cooling, Plumbing & Electrical, Inc.
4.4(
614
)
Tankless Water Heater - Repair

Serving Crystal Lake, IL and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Free estimates

Emergency services offered

"TopTec responded immediately, scheduled the appointment for 8AM the next business day. Jason the plumber arrived early, concisely explained his planned actions, coordinated with other trades, professionally executed the installation of the tankless heater with minimal disruptions, cleaned up and left a happy customer. Toptec did an excellent job, for my next plumbing issue I will call Jason at Toptec."
Duct Cleaning Before/After
Additional Photos
Additional Photos
Barrington Geothermal Lake Heat Exchangers
Barrington Geothermal - WaterFurnace Geothermal Heating/Cooling Systems with Desuperheaters

+48

Response time1 day
Response rate100%
10 neighbors recently requested a quote
Avatar for Cosmic Plumbing LLC
Cosmic Plumbing LLC
5.0(
16
)
Tankless Water Heater - Repair

Serving Crystal Lake, IL and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"We had Chad from Cosmic Plumbing out to replace our old water softener. He was very professional and informative from start to finish! He was fairly priced and easy to work with. Highly recommend for all your plumbing needs!"
4 neighbors recently requested a quote
Avatar for Four Seasons Heating & Air Conditioning
Four Seasons Heating & Air Conditioning
4.3(
3,298
)
Tankless Water Heater - Repair

Serving Crystal Lake, IL and surrounding areas

Approved (Corporate)

In business since 1971

Free estimates

Emergency services offered

"It couldn’t have gone better! Carl was experienced, knowledgeable and friendly. Plus, he smelled gas which is why he replaced the valve on my water heater. It was a great visit!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Response time9 hrs
44 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for TRIANGLE PLUMBING LLC
TRIANGLE PLUMBING LLC
5.0(
32
)
Tankless Water Heater - Repair

Serving Crystal Lake, IL and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

Triangle Plumbing, operated by a seasoned professional, offers comprehensive plumbing solutions for both residential and commercial clients. With years of experience and a commitment to excellence, we provide a full range of services, including installations, repairs, and 24/7 emergency assistance. Combining quality workmanship with competitive pricing, Nathan and his crew ensure customer satisfaction through transparent communication and prompt, efficient service. Contact Triangle Plumbing for expert solutions tailored to your needs and make us your dedicated plumbing contractor to address all your plumbing concerns with precision and care.

Recommended by73%of homeowners
Avatar for TDH Mechanical Heating & Cooling Contractors
TDH Mechanical Heating & Cooling Contractors
4.7(
366
)
Tankless Water Heater - Repair

Serving Crystal Lake, IL and surrounding areas

In business since 1985

Free estimates

Emergency services offered

"After purchasing the Big Deal, I was contacted within 1 day. The appointment for the inspection was scheduled within 2 business days, the installation was done, within the week.  Not only did these Professionals install the furnace, condenser and air conditioner. They completely redid the venting of the furnace and hot water heater, moved the electrical and water lines in a more efficient route, and built a pad for the air conditioner complete with pea gravel  and substantial pad.  In my 35 plus years of ownership I have never been so happy with a contractor. Very responsive to my questions about maintenance of the units.
"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+18

Recommended by94%of homeowners
Avatar for Lifeline Plumbing Heating & Cooling
Lifeline Plumbing Heating & Cooling
4.6(
2,422
)
Tankless Water Heater - Repair

Serving Crystal Lake, IL and surrounding areas

In business since 2011

Emergency services offered

Warranties offered

"Lifeline was great. Our hot water heater went out tonight and within 1.5 hours of calling Brandon was here ready to replace our hot water heater. He gave us multiple options and discussed each in detail with us. Very professional and will definitely use again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+15

Response time7 hrs
6 neighbors recently requested a quote
Recommended by89%of homeowners
...
Showing 1-10 of 93