Boiler Repair Services
Affordable Boiler Repair in Marin, Sonoma & Napa County with Ongaro & Sons
Is your boiler making strange noises or just not getting the job done?
Boilers are durable systems, but like any mechanical equipment, they can develop issues over time due to wear and tear, mineral buildup, leaks, or faulty components.
Whether you’re facing minor issues or a complete boiler breakdown, the skilled and Class C4 licensed contractors at Ongaro & Sons are prepared to handle all your repair needs. Our dedication to quality work and customer satisfaction guarantees you the best care possible. We provide comprehensive boiler repair services tailored to the unique needs of our customers.
Contact us at 415-741-2820 to schedule a boiler repair appointment or request services online and experience the better service that comes with a multi-generational company like Ongaro & Sons.
With nearly a century of combined industry expertise, Ongaro & Sons recognizes the importance of a fully operational boiler for homeowners throughout the North Bay, including Sonoma, Marin, and Napa counties. We take pride in offering prompt, reliable, and efficient boiler repair services.
Our highly trained technicians are equipped to repair all major boiler makes and models, whether gas, electric, or high-efficiency systems.

Signs You Need Boiler Repair
Unusual Noises or Strange Smells: Banging, whistling, or gurgling noises can signal air in the system, low pressure, or a faulty pump. Likewise, metallic, burning, or gas-like odors may point to overheating components or a gas leak, both require prompt professional attention.
Inconsistent Heating or Low Pressure: If your home isn’t heating evenly, or if the boiler takes longer to warm up, it could stem from a clogged pipe, faulty thermostat, or low pressure, often tied to leaks or a failing pressure relief valve.
Pilot Light and Error Codes: Frequent pilot light outages or error codes on digital displays can indicate issues like a malfunctioning thermocouple, gas valve trouble, or electronic system faults that need diagnosing by a professional.
Water Leaks and Rising Bills: Leaks around your boiler not only signal corrosion or worn seals but also contribute to poor efficiency, leading to higher energy bills and system strain.

Our Comprehensive Boiler Repair Services
Boilers are complex systems that require expert care to maintain functionality and safety. Our team at Ongaro & Sons is well-versed in diagnosing and repairing all types of boiler problems throughout the North Bay. Here are some of the key boiler repair services we offer:
Boiler Diagnosis and Troubleshooting
Our skilled technicians begin by thoroughly inspecting your boiler to identify the root cause of any issues. We utilize advanced diagnostic tools and techniques to pinpoint problems accurately, ensuring our repairs are both effective and long-lasting.
Boiler Leak Repairs
Leaks are a common problem in boilers, often caused by corrosion, loose connections, or damaged components. Our team is adept at locating and repairing leaks, preventing further damage and potential safety hazards.
Boiler Pressure Issues
Maintaining the correct pressure in your boiler is crucial for its efficient operation. Whether your boiler is experiencing low or high pressure, our technicians can adjust and balance the system to ensure optimal performance.
Thermostat and Control Repairs
Faulty thermostats or control systems can lead to inconsistent heating and energy inefficiency. We repair and replace malfunctioning thermostats, ensuring your boiler operates smoothly and maintains the desired temperature.
Boiler Component Replacement
Various boiler components may wear out or fail over time. We carry a wide range of high-quality replacement parts and can quickly swap out defective components to restore your boiler’s functionality.
Pilot Light and Ignition Repairs
Issues with the pilot light or ignition system can prevent your boiler from starting. Our technicians are experienced in troubleshooting and repairing these critical components, ensuring reliable ignition and operation.
Boiler Cleaning and Maintenance
Regular maintenance is vital to prolonging the life of your boiler and preventing costly breakdowns. Our comprehensive maintenance services include cleaning, inspecting, and fine-tuning your boiler to keep it
Why Marin, Sonoma & Napa County Homeowners Choose Ongaro & Sons for Boiler Repair
Choosing the right service provider for your boiler repair needs is crucial for ensuring quality work and lasting results. Here’s why Ongaro & Sons stands out as the best choice for boiler repair in Marin, Sonoma, Napa, and all the neighboring communities:
- Long-standing Reputation: Established in 1932 by Ernest V. Ongaro, Ongaro & Sons has built a solid reputation over the years as a trusted provider of HVAC and plumbing services. As a family-owned and operated business, we take pride in delivering exceptional service and standing by our work.
- Certified Expertise: Our technicians are highly trained and hold certifications from reputable organizations, including the Plumbing Heating Cooling Contractors Association (licensed), which reflects our commitment to maintaining the highest standards in the industry. We also hold a Class C4 California license, which validates our proficiency in installing, maintaining, and repairing boilers, hot water heating systems, and steam fittings.
- Quality and Reliability: We are dedicated to providing our customers with the best level of service and value. Our team stays up-to-date with the latest technology and ongoing education to ensure we deliver top-notch repairs using the most advanced methods.
- Customer Satisfaction: Our high level of repeat customers and reviews throughout Marin and Sonoma counties is a testament to our exceptional service. We prioritize customer satisfaction and ensure all work is 100% guaranteed for your peace of mind, garnering us a BBB A+ rating.
- Transparent Pricing: At Ongaro & Sons, we believe in transparent pricing. Our flat rate pricing system means you pay by the job, not by the hour, ensuring no hidden fees or unexpected costs.
- Trusted Technicians: Our friendly and responsible technicians undergo thorough background checks, ensuring you receive service from trustworthy professionals. We are committed to professionalism and respect in every job we undertake.
- Comprehensive Services: Besides boiler repair, we offer a wide range of heating, ventilation, cooling, electrical, and other plumbing services, including Ongaro Maintenance Plans to keep your systems running smoothly year-round. This comprehensive approach allows us to meet all your home comfort needs under one roof.
- Community-Focused: We have deep roots in the North Bay, having served it for nearly a century. We understand the unique needs of local residents and are committed to providing reliable and responsive service.
Schedule Your Boiler Repair Service
Don’t let a failing boiler leave your home in the cold. We proudly serve Sonoma, Marin, and Napa counties, including Santa Rosa, San Rafael, Novato, Petaluma, and surrounding communities. Call us now at 415-741-2820 or book your appointment online for fast, reliable boiler repair you can trust.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons for Boiler Repair
Most boiler faults are system faults presenting at the appliance.
Schedule Service →C-4 licensed for boiler and steam fitting
The classification the work calls for, held directly.
The cause found before the part is replaced
Repeated lockouts usually trace to air, water quality, circulation or venting rather than to the component that keeps failing.
Pressure, expansion and air elimination checked
A failed expansion vessel produces symptoms all over the system and is routinely missed.
Parts availability weighed on older units
For some appliances the sensible advice is that repair is a short-term fix. We will say so rather than sell you two of them.
Family-owned in the North Bay since 1932
The price is agreed before work starts.

Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Value That Lasts
With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.
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Read MoreFrequently Asked Questions
Can I upgrade to a high-efficiency boiler?
Yes, modern boilers are more compact and energy-efficient, saving you money on fuel bills.
Is it safe to run a leaking boiler?
No, turn it off and call a technician. Leaks can cause pressure loss, corrosion, and water damage.
What are signs my boiler needs repair?
No heat, water leaks, strange noises, or frequent cycling on and off are all red flags.