Top-rated boiler repair pros.

Best boiler repair pros near Sunol, CA

Enter your zip and get matched with up to 5 pros

TRUSTED BY SUNOL, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon3.3k+
    Verified boiler repairs reviews

Top-Rated Boiler repair pros in Sunol - Updated Nov 2026

Avatar for DUKES HEATING & AIR CONDITIONING
DUKES HEATING & AIR CONDITIONING
4.8(
135
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Sunol, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"This guy is a real pro! The original installer came out and gave up on the problem, and I never heard from them again. Duke came out, and diagnosed the issue in an hour. He even submitted the request for a part under warranty, received it, and came back to install it 2 days later. The cost was very reasonable. Thanks Duke!"
Heat Pump Repairs & Installations
Central Air Cut-Ins
Electric Furnace Repairs & Installations
Response time1 day
Response rate100%
32 neighbors recently requested a quote
Avatar for PrimeWork Construction
PrimeWork Construction
4.8(
104
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Sunol, CA and surrounding areas

In business since 2012

Free estimates

"Joni an d his crew renovated our master bathroom and part of our kitchen. The bathroom renovation involved rebuil ding the shower (the original one had a leaky basin) and building a beautiful new vanity with a match ing set of cabinets. The kitchen renovation invoved a lot of retiling which all looks great. They also helped us fix our pipes after somne damage they had.I would definitely hire them again."
House Renovation - Brian Project
House Renovation - Brian Project
House Remodeling Mountain View
House Remodeling San Jose Project
House Remodeling Milpitas Project

+468

Recommended by100%of homeowners
Avatar for Green Apple Duct Cleaning
Green Apple Duct Cleaning
5.0(
18
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Sunol, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"I always have my doubts about what I will get for $39, so went into this deal with low expectations. I have a two story house with basement. The Green Apple crew arrived on time, with a text reminder 1 hour ahead. That always helps. Make sure you know where all your vents are, and that they are accessible (move beds and furniture if they cover a vent, that gives the crew more time to do their job). Tony explained the difference between cleaning the vents, and a deep cleaning of the ductwork. After confirming that I had not had the ducts cleaned in the 20 years I have lived here with 2 dogs, Tony walked through the entire house and took photos inside the ducts. How embarrassing! It was obvious I needed the deep cleaning service (what was that lump in there? We needed to find out). Deep cleaning is more expensive, but when you see how much work it takes for Tony and his energetic assistant, Julian, to really get into and clean the ductwork, you will understand why. They worked steadily for over 2 1/2 hours, and had all the correct equipment to do a very thorough job. They even cut into and repaired the original 1929 ductwork to get at difficult spots without extra charges. Overall, a great job, and today was the first time in months I didn't wake up sneezing. If you are sensitive to chemicals or fragrances, be sure to check the disinfectant before it is used, though there is no hint of it after 24 hours, it has a strong smell when first applied. Again, you only need deep cleaning once every 5 years, so it is worth the .15 cents a day to breath easier. Thanks again to Tony and Julian for a job well done. Pay Tony, tip Julian! (The disgusting lump was a towel I had never owned. That made it worth the price right there.)"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+18

Recommended by100%of homeowners
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Sunol, CA and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"Mr. Ferrell first connected his computer to my computer via internet and worked for quite a few hours trying to determine what exactly was wrong. The next day he continued working from his computer for several hours. He determined he would have to have my desktop tower to complete the repair. He and my son met in Huntsville to exchange the tower. He then cleaned up a lot of what was wrong and reloaded Windows 10. He deleted the D: drive which had way too much memory allotted to it. The tower was returned and I plugged it all back together and it is working better than it did when I first purchased it. I would use him again and I recommend him highly to anyone needing computer updating and/or repair. His work is warrantied and he is very personable, knowledgeable, and helpful."
2014 Super Service Award Winner!
Additional Photos
Recommended by97%of homeowners
Avatar for JAZZ HEATING & AIR CONDITIONING
JAZZ HEATING & AIR CONDITIONING
5.0(
8
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Sunol, CA and surrounding areas

In business since 1986

Free estimates

Credit card accepted

"Jazz Heating & Air Conditioning has been amazing to work with. I sent out inquiries to several other companies on Angie's List. I had done a lot of research and knew exactly which furnace I wanted. Mirza was super responsive over messaging and was able to provide me a proposal without having to schedule an appointment for estimation! He had me take some pictures & measurements and send them over. This was such a pleasure because all the other companies wanted to send someone over, and I don't have time for that many visits. The price that Jazz gave me was very competitive, and they didn't try to upsell me to a more complex unit. The replacement turned out great. They cleaned up really nicely and was really thoughtful in giving me a tutorial of the system."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+3

Recommended by100%of homeowners
...
Showing 1-10 of 79
Boiler Repair FAQs, answered by experts

Regular inspections, cleaning, and checking of exhaust systems maintain safe operation, ensuring efficiency.

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.

Even if you do everything right, your boiler’s pilot light might not come on. This has a number of possible causes, but the most common is a blocked jet. These jets are small and clog up even with a small amount of debris. You can clean it yourself or hire a pro to replace the component. Other possible causes include a faulty fan and frozen pipes, among others.

A poorly maintained boiler can lead to serious issues like deadly carbon monoxide poisoning, so schedule regular maintenance services. Of course, it’s also a good idea to check your carbon monoxide detectors in your home to make sure they’re working properly. Moreover, when you forget to maintain your boiler, small problems can lead to something much more serious, which will cost you more money in the long run. Repairs average around $400, while a full replacement can total over $6,000.

An expansion tank must always be installed on the supply side, which is the side where the boiler sends water out to heat the systems. That placement allows the water to push against the air and condense properly as it is heated, then circulated through the system. Professional installers can recommend the best place on the supply side for an expansion tank.

The Sunol, CA homeowners’ guide to boiler repairs

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