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There are 6 highly-rated local boiler repair pros.

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Find Boiler repair pros in Union

Avatar for Ka'Vontay's Door Installation

Ka'Vontay's Door Installation

New on AngiNew on Angi
Approved Pro

Ka'Vontay's Door Installation

New on AngiNew on Angi
Approved Pro
3 years of experience
Free onsite estimate

Kavontay's 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.

Kavontay's 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 '58 Foundations

'58 Foundations

4.24(
21
)
Approved Pro

'58 Foundations

4.24(
21
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
20 local quotes requested

For over 66 years, '58 Foundations & Waterproofing has provided the highest-quality basement waterproofing, crawl space encapsulation, foundation repair, and mold removal. We lead with a promise of Trusted Five-Star Service, which means the customer experience is at the center of everything we do. Since 1958, we have been steadfast in keeping this promise and upholding the values upon which '58 Foundations & Waterproofing was built: trust, teamwork, integrity, respect, and communication. From the initial call to job completion, our customers are met with knowledgeable, caring, and professional staff prepared to offer a five-star experience that is unmatched in the home repair industry. What’s more, you can enjoy the peace of mind that comes with our lifetime warranty and our industry-unique money-back guarantee!

"The work crew's foreman Aaron was very professional and extremely knowledgeable. His crewmembers Rusty, Otis, and Dizzy, all worked very hard and efficiently 2 remove the old and unnecessary insulation and Black netting that was causing moisture build up in my crawlspace. They removed all the debris, cleaned up the work area, and left my crawlspace looking beautiful , and moisture free! I would highly recommend '58 Foundation! Their prices also beat their competitors by thousands of dollars! I am very satisfied with the work ethic of this Company!"

SUSAN F on September 2023

For over 66 years, '58 Foundations & Waterproofing has provided the highest-quality basement waterproofing, crawl space encapsulation, foundation repair, and mold removal. We lead with a promise of Trusted Five-Star Service, which means the customer experience is at the center of everything we do. Since 1958, we have been steadfast in keeping this promise and upholding the values upon which '58 Foundations & Waterproofing was built: trust, teamwork, integrity, respect, and communication. From the initial call to job completion, our customers are met with knowledgeable, caring, and professional staff prepared to offer a five-star experience that is unmatched in the home repair industry. What’s more, you can enjoy the peace of mind that comes with our lifetime warranty and our industry-unique money-back guarantee!

"The work crew's foreman Aaron was very professional and extremely knowledgeable. His crewmembers Rusty, Otis, and Dizzy, all worked very hard and efficiently 2 remove the old and unnecessary insulation and Black netting that was causing moisture build up in my crawlspace. They removed all the debris, cleaned up the work area, and left my crawlspace looking beautiful , and moisture free! I would highly recommend '58 Foundation! Their prices also beat their competitors by thousands of dollars! I am very satisfied with the work ethic of this Company!"

SUSAN F on September 2023


Avatar for Hvac Service Corporation

Hvac Service Corporation

New on AngiNew on Angi
Approved Pro

Hvac Service Corporation

New on AngiNew on Angi
Approved Pro
18 years of experience
Free onsite estimate

We have extensive experience providing design, construction, installation and on going maintenance for all of our service lines across a diverse spectrum of industries and asset types. Founded over 75 years ago, HVAC Service Corporation has been a cornerstone in the Carolinas for reliable and efficient HVAC solutions. Our commitment to quality service and customer satisfaction has made us a trusted name in the industry. We are licensed and insured in North Carolina, South Carolina, and parts of Georgia, with our headquarters located in Gastonia, NC. Our mission is to provide top-notch commercial heating and air conditioning services that meet the unique needs of our clients.

We have extensive experience providing design, construction, installation and on going maintenance for all of our service lines across a diverse spectrum of industries and asset types. Founded over 75 years ago, HVAC Service Corporation has been a cornerstone in the Carolinas for reliable and efficient HVAC solutions. Our commitment to quality service and customer satisfaction has made us a trusted name in the industry. We are licensed and insured in North Carolina, South Carolina, and parts of Georgia, with our headquarters located in Gastonia, NC. Our mission is to provide top-notch commercial heating and air conditioning services that meet the unique needs of our clients.


Avatar for Chris Foster Heating & Air

Chris Foster Heating & Air

4.58(
391
)
Approved Pro

Chris Foster Heating & Air

4.58(
391
)
Approved Pro
Customers say: True professional
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
51 local quotes requested

With over 30 years experience, Chris Foster Heating & Air understands that it's important to do the job right the first time, and that we work for YOU. We will arrive on time and we get the job done right the first time. We offer a service warranty for peace of mind. There is no job too big or too small for us to handle, and we go above and beyond anyone else to make sure that we exceed your expectations. Our #1 goal is customer satisfaction and we can't wait to serve you and add you to our long list of happy customers. **FINANCING AVAILABLE - PLEASE CALL FOR DETAILS.**

"Solve my issue with a water leak on furnace. Fixed it with no issues. Other companies couldn't. Proficient and knowledgeable. Would use again. Fair price. Convenient. "

Tony L on August 2025

With over 30 years experience, Chris Foster Heating & Air understands that it's important to do the job right the first time, and that we work for YOU. We will arrive on time and we get the job done right the first time. We offer a service warranty for peace of mind. There is no job too big or too small for us to handle, and we go above and beyond anyone else to make sure that we exceed your expectations. Our #1 goal is customer satisfaction and we can't wait to serve you and add you to our long list of happy customers. **FINANCING AVAILABLE - PLEASE CALL FOR DETAILS.**

"Solve my issue with a water leak on furnace. Fixed it with no issues. Other companies couldn't. Proficient and knowledgeable. Would use again. Fair price. Convenient. "

Tony L on August 2025


Avatar for HG Services

HG Services

4.94(
18
)
Approved Pro

HG Services

4.94(
18
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
586 local quotes requested

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 our services offered and call or click to schedule an estimate today!

"Great! Joel was great to work with. He did an excellent job."

Bill L on October 2025

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 our services offered and call or click to schedule an estimate today!

"Great! Joel was great to work with. He did an excellent job."

Bill L on October 2025


Carolina Heating Service

New on AngiNew on Angi
Approved Pro

Carolina Heating Service

New on AngiNew on Angi
Approved Pro
40 local quotes requested
44 years of experience

At Carolina Heating Service, we're more than just your local HVAC experts—we're your neighbors, dedicated to providing the highest quality service to keep your home comfortable year-round. From expertly trained technicians to responsive communication, we're here to deliver peace of mind with every visit. Discover what sets us apart and why Greenville residents trust us for their heating, cooling, and generator needs. Carolina Heating Service was founded in 1981 by Horace and Scott Kelly, dedicated to providing top-notch HVAC and plumbing services in the Greenville, SC, area.

At Carolina Heating Service, we're more than just your local HVAC experts—we're your neighbors, dedicated to providing the highest quality service to keep your home comfortable year-round. From expertly trained technicians to responsive communication, we're here to deliver peace of mind with every visit. Discover what sets us apart and why Greenville residents trust us for their heating, cooling, and generator needs. Carolina Heating Service was founded in 1981 by Horace and Scott Kelly, dedicated to providing top-notch HVAC and plumbing services in the Greenville, SC, area.


Avatar for Five Star Windows and Remodeling

Five Star Windows and Remodeling

4.78(
36
)
Approved Pro

Five Star Windows and Remodeling

4.78(
36
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
64 local quotes requested

Five Star Windows & Remodeling, LLC, is a great choice in Spartanburg County and the surrounding communities for all your home improvement needs! Five Star is bonded and licensed. Five Star Windows & Remodeling offers superior, first class remodeling, renovating, and repairing services for inside and outside your home. Check Five Star Windows & Remodeling at Home Advisor and Angie’s List. Five Star works hard to complete your project to your 100% satisfaction. Call 864-706-9939 today for a free estimate.

"I would like to express my gratitude to 5 STARWINDOWS & REMODELING LLC for the phenomenal job they did on our project ( SUNROOM ) there team was always courteous respectful and professional, I was impressed by there communication and ability to resolve unexpected issues swiftly." I would not hesitate to recommend 5 STAR REMODELING to others and look forward to working with them again."

Butch H on October 2025

Five Star Windows & Remodeling, LLC, is a great choice in Spartanburg County and the surrounding communities for all your home improvement needs! Five Star is bonded and licensed. Five Star Windows & Remodeling offers superior, first class remodeling, renovating, and repairing services for inside and outside your home. Check Five Star Windows & Remodeling at Home Advisor and Angie’s List. Five Star works hard to complete your project to your 100% satisfaction. Call 864-706-9939 today for a free estimate.

"I would like to express my gratitude to 5 STARWINDOWS & REMODELING LLC for the phenomenal job they did on our project ( SUNROOM ) there team was always courteous respectful and professional, I was impressed by there communication and ability to resolve unexpected issues swiftly." I would not hesitate to recommend 5 STAR REMODELING to others and look forward to working with them again."

Butch H on October 2025


Bentley's Heating & Air

4.92(
36
)
Approved Pro

Bentley's Heating & Air

4.92(
36
)
Approved Pro
Customers say: Super punctual
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
95 local quotes requested

Bentley's Heating and Air has been serving the upstate since 1991. A recent winner of several years of the Better Business Integrity Award shows that we strive for Excellency and 100% satisfaction. We are skilled in all aspects of the heating and cooling business. We sell and service all makes and models. There is never a job too big or too small. Mention Angie's list for a special discount!

"Robbie was excellent and found the source of a problem that my previous heating/air contractors missed."

Greg S on December 2019

Bentley's Heating and Air has been serving the upstate since 1991. A recent winner of several years of the Better Business Integrity Award shows that we strive for Excellency and 100% satisfaction. We are skilled in all aspects of the heating and cooling business. We sell and service all makes and models. There is never a job too big or too small. Mention Angie's list for a special discount!

"Robbie was excellent and found the source of a problem that my previous heating/air contractors missed."

Greg S on December 2019


"Exactly what I wanted with exceptional craftsmanship on our custom screened in porch and custom made Porch Swing."

Jim K on February 2024

With over 23 years of professional general contracting experience, we are here to address any renovation or remodeling need you may have.

"Exactly what I wanted with exceptional craftsmanship on our custom screened in porch and custom made Porch Swing."

Jim K on February 2024


Avatar for Flaker Flooring L.L.C.

Flaker Flooring L.L.C.

4.56(
50
)
Approved Pro

Flaker Flooring L.L.C.

4.56(
50
)
Approved Pro
Customers say: True professional
429 local quotes requested
26 years of experience

Flaker Flooring is a family run business that provides quality install with respect to a customers home and a keen eye for detail. 25 years of experience gives Flaker Flooring the confidence to help a home owner reach their goals with flooring upgrades to their home... We take pride in our work and would love the chance to work in your home. "We got you covered..."Our company also provides Plumbing, electrical, and painting services.

"he came gave me 300 for the job since - came bk and i gave him 200 i held out 100- ever wk its some other excuse this has been going on for 3 wks -he just hung up on me"

Eileen L on August 2025

Flaker Flooring is a family run business that provides quality install with respect to a customers home and a keen eye for detail. 25 years of experience gives Flaker Flooring the confidence to help a home owner reach their goals with flooring upgrades to their home... We take pride in our work and would love the chance to work in your home. "We got you covered..."Our company also provides Plumbing, electrical, and painting services.

"he came gave me 300 for the job since - came bk and i gave him 200 i held out 100- ever wk its some other excuse this has been going on for 3 wks -he just hung up on me"

Eileen L on August 2025

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Boiler Repair questions, answered by experts

It can be difficult to determine the cause of a coolant leak unless you have the unit inspected by a certified professional. Most coolant leaks are caused by wear and tear on seals and joints. This typically happens five years after a unit is installed. Additionally, faulty or worn compressors, evaporator coils, and condenser coils can also cause leaks.

A heating expert will be able to clarify whether it's worth the cost of replacing your radiator based on the cost of repairs. Between parts and labor, you'll pay between $250 and $2,500 for a new radiator depending on the type of unit. If the long-term costs of fixing a radiator are higher than replacement, it's best to update your model.

Regular inspections, filter replacements, and professional tune-ups keep the system running efficiently.

If you go to turn it counterclockwise and it won’t turn anymore, it’s open. Like most other valves, you should be able to turn a radiator valve counterclockwise (to the left) to open it and clockwise (right) to close it. To close a radiator valve, turn it clockwise until you meet some resistance and can’t turn anymore, but do so carefully to avoid breaking the valve.

Boiler leaks are the most common problem that impacts this fixture. Some leaks stem from corroded pipes and tanks, while others are due to damaged seals or excessive pressure. No matter how you slice it, boiler leaks are bad news. This issue leads to water damage in the home and malfunctioning electrical components in and around the boiler.

The Union, SC homeowners’ guide to boiler repairs

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