Top-rated boiler repair pros.

Best boiler repair pros near Graton, CA

Enter your zip and get matched with up to 5 pros

TRUSTED BY GRATON, CA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon775
    Verified boiler repairs reviews

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

Avatar for Moore Home Services
Moore Home Services
4.4(
225
)
Electric Boiler or Radiator Heating System - InstallElectric Boiler or Radiator Heating System - RepairGas Boiler or Radiator Heating System - Install

Serving Graton, CA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"I have to give this 3 star rating based on price. 5 stars for customer service, promptness, courtesy and professionalism. The gentleman that provided me with the estimate was top notch. NO pressure, 100% honest and generally very respectful of my interaction. However, the price quoted is, without a doubt, not realistic. I searched online for furnace pricing and a very high quality and highly rated piece of equipment averaged around $2500. But my quote for a new furnace with installation was $7500! This is totally unacceptable! Furnace replacement is not rocket science. As a very handy guy, and one who has, first hand, witnessed an installation, $5000 in labor for a 4 to 5 hour job is just way more than this is worth. $1000 per hour is more than lawyers and doctors charge. And there is no flexibility on this pricing. And I don't feel that the months overhead of this company should be charged on each and every installation. Additionally, I received quotes from 3 other companies and their pricing is almost identical. Price fixing? Taking advantage of consumers? You make the call. BUYER BEWARE!"
After 1
 View 1
 Right Side View
Perfect Retrofit
After 2

+15

29 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Peter Levi Plumbing, Heating, Cooling, Drains
Peter Levi Plumbing, Heating, Cooling, Drains
3.0(
13
)
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 Graton, CA and surrounding areas

Approved (Corporate)

In business since 1990

Free estimates

Warranties offered

"Service plumber arrived on site, on time and was ready to begin. He was friendly and professional. He was fully aware of the problem and what needed to be done. He acquired the necessary parts and changed them accordingly as proficient as possible. Our bathroom sink drain issue was completely resolved and ready. Thank you Eric for a great job!"
10 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for Bragg Home Services
Bragg Home Services
5.0(
12
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+9 more

Serving Graton, CA and surrounding areas

In business since 1968

Free estimates

Warranties offered

For over 56 years Bragg Home Services has specialized in offering residential and light commercial plumbing, heating, and air conditioning services to the residents of Sonoma, Marin, and Napa Counties. At Bragg Home Services we know that our customers expect integrity, excellence, value, and commitment. That’s why at Bragg Home Services we hire only the best people, and use only the best products, offering exceptional value, backed by our lifetime workmanship guarantee. Because at Bragg Home Services, your satisfaction is our number 1 priority.

Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+9

Response time9 hrs
Response rate100%
Recommended by8%of homeowners
Avatar for Posada's Heating & Air Conditioning
Posada's Heating & Air Conditioning
4.9(
10
)
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 Graton, CA and surrounding areas

In business since 2004

Free estimates

"It went very well. I believe they finished it in one day. The price was very fair and lower than the other two places we checked. The heater works spectacularly according to our tenants. The city inspector came out two days ago and gave it his seal of approval and final inspection passed! Luis the owner is an honest man. He is licensed and does great work. I gladly would refer him to anyone who needs a new heater or Air conditioner! Thanks Luis...."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+23

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 Graton, 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 HVAC Oren Services
HVAC Oren Services
4.5(
17
)
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 Graton, CA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"The services were excellent - thorough, careful and complete. Arrived on time, and walked through the house to be certain that all vents were located. In addition, noted an issue in the basement where the vents originate and suggested a solution. Very, very pleased with this service and recommend Oren without reservation."
Air, Furnace and Dryer Vent Cleaning
Mattress and Carpet Cleaning
Recommended by93%of homeowners
Showing 1-10 of 50
Boiler Repair FAQs, answered by experts

Blockages can occur for various reasons, primarily linked to the accumulation of debris or substances within the heating system. Common causes include the buildup of sediment, rust, or mineral deposits inside the boiler or its pipes, hindering water flow and heat transfer. Additionally, air pockets or trapped gasses can impede circulation. In central heating systems, sludge or corrosion within radiators can obstruct the flow of hot water. External factors like frozen pipes in winter can also lead to blockages. Regular maintenance will help prevent blockages and ensure efficient boiler operation.

Addressing gaps and cracks reduces heat loss and improves energy use.

Steam boilers require flushing at least every six to 12 months to keep them operating effectively for as long as possible. Depending on your water quality and frequency of use, you might need to do this more frequently. The flushing process helps to remove problematic buildup of sediments. While a boiler contractor near you can perform a thorough annual flush, learning how to drain the system yourself means you can do this monthly if you experience speedy mineral accumulation because of hard water. 

Repair costs typically range from $200 to $1,500, depending on the issue, such as leaks, burner malfunctions, or thermostat failures. Complex repairs involving heat exchanger replacement can be more expensive.

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.

The Graton, CA homeowners’ guide to boiler repairs

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