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TRUSTED BY SUNNYVALE, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon2.1k+
    Verified boiler repairs reviews

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"Quick to respond, schedule, and complete work. Went ahead and also noted other improvements we may want to consider around the house with his estimate. Would definitely use him again. Thanks Jess!"

H C on August 2025

Over 22 years experience in the plumbing industry servicing the peninsula. Jess Plumbing, established in 2019 by Jesus Coronel, provides excellent customer service and quality work Specializes in: Residential,Commercial & Underground

"Quick to respond, schedule, and complete work. Went ahead and also noted other improvements we may want to consider around the house with his estimate. Would definitely use him again. Thanks Jess!"

H C on August 2025


Jim's Air Systems

4.38(
8
)
Approved Pro

Jim's Air Systems

4.38(
8
)
Approved Pro
145 local quotes requested
47 years of experience

We are a family owned and operated Heating and Air conditioning and solar contractor in the Bay Area for the past 40 years. We specialize in Residential, Commercial, and New Construction installation. We pride ourselves in quality workmanship and fast reliable service at a fair price. We will not price gouge you like the big companies do. Call us for a free estimate, ask for Josh. 925-584-2634

"Josh got on this very quick and quoted the best price with good brand day and night carry"

Jianyu D on November 2024

We are a family owned and operated Heating and Air conditioning and solar contractor in the Bay Area for the past 40 years. We specialize in Residential, Commercial, and New Construction installation. We pride ourselves in quality workmanship and fast reliable service at a fair price. We will not price gouge you like the big companies do. Call us for a free estimate, ask for Josh. 925-584-2634

"Josh got on this very quick and quoted the best price with good brand day and night carry"

Jianyu D on November 2024


Maverick Water Heaters & Plumbing

625 Vue De Mer Avenue
5.00(
15
)
Approved Pro

Maverick Water Heaters & Plumbing

625 Vue De Mer Avenue
5.00(
15
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
70 local quotes requested

We specialize in plumbing services, water heaters, repairs, inspections, installations, and more! 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 all the services we offer below and call -or- click to schedule a free estimate today! 650-400-2459

"Great! Steve arrived super quick, identified the problem and fixed it. Nice work and a nice guy. I would recommend him to anyone."

James M on February 2024

We specialize in plumbing services, water heaters, repairs, inspections, installations, and more! 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 all the services we offer below and call -or- click to schedule a free estimate today! 650-400-2459

"Great! Steve arrived super quick, identified the problem and fixed it. Nice work and a nice guy. I would recommend him to anyone."

James M on February 2024


"Jim Sozzi was AMAZING. We needed urgent help with a toilet and he took care of us and helped uncover a few other matters that he also fixed. We're planning to hire him for future work. Would strongly recommend."

Mitch A on December 2023

We are your trusted, local plumber in SF dedicated to providing every customer with the highest quality, seamless experience when it comes to plumbing, water heater and sewer repairs, installations and service.

"Jim Sozzi was AMAZING. We needed urgent help with a toilet and he took care of us and helped uncover a few other matters that he also fixed. We're planning to hire him for future work. Would strongly recommend."

Mitch A on December 2023


Avatar for AAA Mike Counsil Plumbing and Rooter

AAA Mike Counsil Plumbing and Rooter

1915 O Toole Way
4.05(
309
)
Approved Pro

AAA Mike Counsil Plumbing and Rooter

1915 O Toole Way
4.05(
309
)
Approved Pro
Customers say: Quality work
360 local quotes requested
31 years of experience

Mike Counsil Plumbing has been family owned and operated from the start. Our customers are our neighbors, and we are proud to be part of the community. We offer the highest quality of plumbing, and friendliest customer service in the industry. When you want it done right, call Mike Counsil Plumbing. Owner operated since 1994. 50 employees. All technicians drug tested and background checked.

"Went well"

Kevin L on May 2025

Mike Counsil Plumbing has been family owned and operated from the start. Our customers are our neighbors, and we are proud to be part of the community. We offer the highest quality of plumbing, and friendliest customer service in the industry. When you want it done right, call Mike Counsil Plumbing. Owner operated since 1994. 50 employees. All technicians drug tested and background checked.

"Went well"

Kevin L on May 2025


Avatar for Bailey Plumbing Inc

Bailey Plumbing Inc

Located In:
5.00(
11
)
Approved Pro

Bailey Plumbing Inc

Located In:
5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
35 local quotes requested

Our local and family owned and operated plumbing company at Bailey Plumbing Inc. offers expert plumbing services to homes in Morgan Hill and surrounding areas. Specializing in tankless water heater services, we can do it all, from drain cleaning and sewer services to gas line solutions and leak detection. We help our neighbors fast, even offering same-day appointments and after-hours service, as we are available by phone 24 hours a day, 7 days a week. Our team stands behind our work with industry-leading warranties and guarantees. When you need plumbing solutions in Morgan Hill, look no further than our expert plumbers at Bailey Plumbing Inc.

"Good communication and fast response. Would do business again."

Paul F on January 2024

Our local and family owned and operated plumbing company at Bailey Plumbing Inc. offers expert plumbing services to homes in Morgan Hill and surrounding areas. Specializing in tankless water heater services, we can do it all, from drain cleaning and sewer services to gas line solutions and leak detection. We help our neighbors fast, even offering same-day appointments and after-hours service, as we are available by phone 24 hours a day, 7 days a week. Our team stands behind our work with industry-leading warranties and guarantees. When you need plumbing solutions in Morgan Hill, look no further than our expert plumbers at Bailey Plumbing Inc.

"Good communication and fast response. Would do business again."

Paul F on January 2024


Avatar for Comfort Energy Inc

Comfort Energy Inc

1465 N Milpitas Blvd
4.60(
116
)
Approved Pro

Comfort Energy Inc

1465 N Milpitas Blvd
4.60(
116
)
Approved Pro
Customers say: Quick response
150 local quotes requested
22 years of experience

Message from the Owner/ Founder: “As a third generation heating and air technician and retired 20 year veteran of fire and public safety, I wanted to create a service company that you could count on for its integrity and professionalism. When our service technicians arrive at your home, we want you to feel the same level of confidence and trust you get from a firefighter arriving at your home to help when you call 911. Our service technicians are professional, courteous, and well trained. I am comfortable allowing them into the homes of my families and friends who are firefighters, police officers and the public. Thank you for the opportunity to service your comfort needs and believing in our company. We look forward to a continued long relationship. Warm regards, Harry Abbott” Comfort Energy Inc is a full service provider of quality air conditioning and heating repair and installation. . Locally owned and operated, with over 30 years of experience. We are proud members of the Nexstar network of contractors. We specialize in helping homeowners make informed decisions to best meet your family's comfort needs. Spanish and Japanese spoken.

"We had a wonderful experience with Comfort Energy! The service person, whose name was Chance, did a thorough evaluation of the problem with a focus on saving us as much money as possible, to either repair or replace our 30-year-old heat furnace. He quickly determined that our inlet filter was too dense (it was a Merv 11 and should have been a Merv 8) and that that was probably causing the heater to go off an on every 5-10 minutes. He then tested and confirmed his hypothesis. He also performed a CO test to make sure there wasn't anything more serious going on. Finally, he gave us a good idea of replacement options, which we should probably do before the next Winter, but not necessarily right away. All in all, this is exactly the kind of assessment we needed, and it cost orders of magnitude less than what was estimated by the first service company we had come out. Chance was great, and Comfort Energy is our go-to for heating and cooling service and/or installation from now on."

Gary S on April 2025

Message from the Owner/ Founder: “As a third generation heating and air technician and retired 20 year veteran of fire and public safety, I wanted to create a service company that you could count on for its integrity and professionalism. When our service technicians arrive at your home, we want you to feel the same level of confidence and trust you get from a firefighter arriving at your home to help when you call 911. Our service technicians are professional, courteous, and well trained. I am comfortable allowing them into the homes of my families and friends who are firefighters, police officers and the public. Thank you for the opportunity to service your comfort needs and believing in our company. We look forward to a continued long relationship. Warm regards, Harry Abbott” Comfort Energy Inc is a full service provider of quality air conditioning and heating repair and installation. . Locally owned and operated, with over 30 years of experience. We are proud members of the Nexstar network of contractors. We specialize in helping homeowners make informed decisions to best meet your family's comfort needs. Spanish and Japanese spoken.

"We had a wonderful experience with Comfort Energy! The service person, whose name was Chance, did a thorough evaluation of the problem with a focus on saving us as much money as possible, to either repair or replace our 30-year-old heat furnace. He quickly determined that our inlet filter was too dense (it was a Merv 11 and should have been a Merv 8) and that that was probably causing the heater to go off an on every 5-10 minutes. He then tested and confirmed his hypothesis. He also performed a CO test to make sure there wasn't anything more serious going on. Finally, he gave us a good idea of replacement options, which we should probably do before the next Winter, but not necessarily right away. All in all, this is exactly the kind of assessment we needed, and it cost orders of magnitude less than what was estimated by the first service company we had come out. Chance was great, and Comfort Energy is our go-to for heating and cooling service and/or installation from now on."

Gary S on April 2025


Avatar for The Tankless Guys Plumbing Corp.

The Tankless Guys Plumbing Corp.

Based Out Of
5.00(
5
)
Approved Pro

The Tankless Guys Plumbing Corp.

Based Out Of
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
198 local quotes requested

We offer a variety of plumbing services. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality of work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

"The work was excellent, very cleanly done, great knowledge and helpful information from Gert, the owner of company. Good communication from company. Would work with this business again."

Lois T on July 2024

We offer a variety of plumbing services. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality of work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

"The work was excellent, very cleanly done, great knowledge and helpful information from Gert, the owner of company. Good communication from company. Would work with this business again."

Lois T on July 2024


"So far so good. Snaking of kitchen sink with very old pipes. Hopefully snake did not poke pipes. Only time will tell. Keeping fingers crossed. They did a good job explaining and triple checked for leaks before they left. Of course they tried to upsell and gave us a metal trap they did not quote us upfront for. We would have chosen it over plastic, but price difference would need to be cleared upfront. That's the only negative. Otherwise, thus far we are very happy with the result. Thank you for coming on such short notice and on time! Super appreciated. 4.5-5 stars."

Susanne P on December 2024

Amesos Plumbing, Inc. 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!

"So far so good. Snaking of kitchen sink with very old pipes. Hopefully snake did not poke pipes. Only time will tell. Keeping fingers crossed. They did a good job explaining and triple checked for leaks before they left. Of course they tried to upsell and gave us a metal trap they did not quote us upfront for. We would have chosen it over plastic, but price difference would need to be cleared upfront. That's the only negative. Otherwise, thus far we are very happy with the result. Thank you for coming on such short notice and on time! Super appreciated. 4.5-5 stars."

Susanne P on December 2024


Avatar for Valley Heating, Cooling, Electrical and Solar

Valley Heating, Cooling, Electrical and Solar

1171 N 4th St
4.73(
1,691
)
Approved Pro

Valley Heating, Cooling, Electrical and Solar

1171 N 4th St
4.73(
1,691
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
30 local quotes requested

Since 1962, we have been committed to living up to our company slogan every day – The Home of Old Fashioned Service. That means reliability, expert advice, quality work and great service for our customers – and a 100% guarantee. Our entire team can’t wait to show you the difference great service can make for your heating, cooling, electrical, solar and above all, “comfort” needs. We sub-contract with licensed plumbers when necessary.

"watch out - they charge a service fee for quotes"

Joshua M on February 2021

Since 1962, we have been committed to living up to our company slogan every day – The Home of Old Fashioned Service. That means reliability, expert advice, quality work and great service for our customers – and a 100% guarantee. Our entire team can’t wait to show you the difference great service can make for your heating, cooling, electrical, solar and above all, “comfort” needs. We sub-contract with licensed plumbers when necessary.

"watch out - they charge a service fee for quotes"

Joshua M on February 2021

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Boiler Repair questions, answered by experts

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.

Once you know where your bleed valves are and how to use them, bleeding out heaters is a quick process. Expect it to take around 10 to 20 minutes, possibly longer if you have a lot of heaters or are still learning how they work. If you have a central bleed valve on your boiler, the process still takes the same amount of time. Make sure you have any keys necessary to turn the bleed valves on. Without bleed valves, the process should take around three hours.

If you don't clean a boiler, you may have higher energy bills or no heat. A dirty boiler is inefficient and can't properly maintain a heating system. It may break down more often due to corrosion or clogs from soot and oil buildup. Cleaning a boiler improves its performance. The cost to replace a boiler can be expensive, so keeping it clean is a cost-effective practice.

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. 

Yes, it is OK to turn off some radiators, and you’ll save money on heating costs if you make it a regular habit to turn your radiators off in unused rooms that don’t need heat. That said, turn them back on when you need to heat your whole home instead of cranking up the dial on the ones you haven’t closed to compensate. The latter will result in higher heating costs and more wear and tear on your system.

The Sunnyvale, CA homeowners’ guide to boiler repairs

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

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