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Best boiler repair pros near Millbrae, CA

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    Average homeowner rating
  • Verified reviews icon691
    Verified boiler repairs reviews

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

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 Millbrae, 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 Millbrae, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"My family and I just moved to a new home here in west Portland, One day I decided to open up one vent to see what was inside. I was in shock of how filthy my air ducts were! So I called Green Apple duct cleaning, And let me tell you, they new exactly what to do! By far the most professional and hard working group I've ever had clean my air duct system, if their is any problem at all, they will fix it! I have a relatively large house, and only paid 250! It was way cheaper then prices from other companies! I would highly recommend Green Apple to everyone!"
Additional Photos
Additional Photos
Additional Photos
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Additional Photos

+18

Recommended by100%of homeowners
Avatar for MGM Construction
MGM Construction
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 Millbrae, CA and surrounding areas

In business since 2022

Free estimates

Emergency services offered

"MGM Construction provided excellent work. Adolfo and Gerardo were responsive and dependable. They completed the work in the time allotted and were willing to complete other house repairs such as floor sanding, window and ceiling repairs, etc. The brothers are so easy to talk with and provided valuable professional advice. Their pricing is reasonable and fair. We will hire them again and highly recommend them to others."
Bathroom Remodeling
Remodeling - Kitchen & Bathroom Project
Remodeling -  Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+28

Recommended by100%of homeowners
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Boiler Repair FAQs, answered by experts

NATE (North American Technician Excellence) certification is not legally required for HVAC technicians in most areas, but hiring a professional with this certification is highly recommended. NATE-certified technicians demonstrated their expertise and proficiency in different types of HVAC systems, offering assurance of quality service. It's a voluntary certification, yet it indicates a commitment to professionalism and ongoing training. Choosing a NATE-certified technician often means you're working with someone who is up-to-date on industry standards and best practices, which can lead to better service, energy efficiency, and long-term cost savings.

Some high-quality steam boilers come with 10-year warranties, but a well-installed, properly maintained model can last at least 20 to 25 years. Learning how to clean a boiler, getting an annual professional service, and keeping up with maintenance and repairs on your heating system are all important for getting the most out of your model. 

Most home boilers will need an expansion tank. That’s because these boilers are closed-loop systems, where the water is trapped. An expansion tank is needed when the boiler heats the water and it expands, allowing air to condense in the tank to make room for the water. Other types of boilers don’t use an expansion tank, such as traditional steam boilers, but these aren’t as common. And hot water tanks may be able to use a pressure release valve instead. When in doubt, call in a pro to take a look.

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.

Signs of needing a new expansion tank include visible leaks and a dull sound when you knock your knuckles against the tank (working tanks should sound hollow). A malfunctioning tank may also sweat with condensation, cause pipes to create loud noises when the system is turned off, and lead to very high-pressure readings on the boiler’s gauges. When in doubt, call for a professional inspection to find the source of the problem.

The Millbrae, CA homeowners’ guide to boiler repairs

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