Air Conditioning Repair & Installation
Air Conditioning Services in Marin, Sonoma & Napa County
These days, air conditioning isn’t a luxury, it’s a necessity. When temperatures rise across the North Bay, you want reliable, efficient cooling to keep your home comfortable.
At Ongaro & Sons, our experienced team of HVAC professionals is here to help you maintain the comfort you deserve. Since 1932, we’ve provided dependable air conditioning repair, maintenance, and new system installation throughout Marin, Sonoma, and Napa counties, as well as communities in between.
Ongaro & Sons delivers full-service air conditioning solutions tailored to the unique climate challenges of the North Bay, from the coastal breezes of Marin to the warmer temperatures of Sonoma. Our expert technicians stay current with the latest training and technologies, ensuring precise diagnostics, thorough maintenance, and expert installations. We service all major AC brands and take pride in doing every job right the first time.
Air Conditioning Maintenance Tips
Keeping your air conditioner in top shape helps it run more efficiently, lowers your energy bills, and extends its life span. You can avoid unexpected breakdowns during the hottest months with just a few simple habits and regular upkeep. Here are some essential maintenance tips to keep your AC performing at its best.
Change Filters Regularly
Dirty filters restrict airflow and reduce your system’s efficiency. Replace or clean your air filters every 30-90 days, more often during high-use seasons, to improve indoor air quality and help your AC run more effectively.
Clean Around the Outdoor Unit
Your AC’s outdoor unit needs space to breathe. Keep it clear of leaves, grass, dirt, and other debris. Trim nearby plants at least 2 feet away to ensure proper airflow and prevent overheating.
Seal Air Leaks
Up to 20%–30% of air escapes through windows, doors, and ductwork gaps. Sealing these leaks keeps your home cooler, making your AC system work less and last longer. In turn, this reduces energy waste and lowers your utility bill.
Use a Programmable Thermostat
A programmable thermostat adjusts temperatures automatically based on your schedule. Set it higher when you’re not home to reduce energy usage and lower your cooling costs, without sacrificing comfort when you return.
Schedule Annual Maintenance
Prevent unexpected breakdowns by scheduling a professional AC tune-up once a year. Technicians inspect, clean, and test your system to ensure it runs efficiently and identify small issues before they become costly repairs.
Air Conditioning Repairs
Not having your air conditioner working on the hottest days California has to offer can be exasperating. Whenever you need an AC repair, let our cooling experts quickly remedy the problem for you. Signs you need air conditioning repair include:
- Hearing an unusual noise
- Smelling an unusual odor like burning
- Feeling warm air coming from your vents
- Noticing your air conditioner is frozen
- HVAC system is leaking water
Ignoring problems usually only makes them bigger and more costly. We make our repairs right the first time, and only use the highest quality parts and materials when working on your system. Our experts are always here for you.
Air Conditioning Installation and Replacement
If your air conditioner has reached the point where repairs no longer do the job or your home’s energy efficiency is at an all-time low, you may need a new system. How do you know if you need a new air conditioning installation? Here are some of the most common issues. If your unit is:
- Approaching the end of its life span (15–20+ years)
- Experiencing more and more repairs
- Showing signs of running inefficiently
If you notice any of these signs, talk to one of our Ongaro & Sons team members. We will design and quote an AC system best suited to your comfort needs and budget. We also offer several financing options, with approved credit, to alleviate any concerns regarding postponing a much-needed upgrade.
Schedule Your Air Conditioning Service
Whether you need a quick repair, seasonal maintenance, or a brand-new installation, our experienced team is ready to help you stay cool and comfortable. We proudly serve Sonoma, Marin, and Napa counties, including Santa Rosa, Bodega Bay, San Rafael, Novato, Glen Ellen, and surrounding cities. Call us now at 415-741-2820 or book your appointment online for fast, reliable AC service 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 Air Conditioning
Cooling problems in these counties are usually a distribution problem wearing a compressor costume.
Schedule Service →We diagnose the whole system, not just the outdoor unit
Warm air at the register has many causes: a failing capacitor, a low charge, a restricted coil, a leaking return. Replacing a condenser without finding which one is why a system gets replaced twice.
Manual J sizing on every replacement
An oversized air conditioner cools fast, shuts off before it dehumidifies, and leaves the house clammy and uneven. We calculate the load against the actual envelope rather than copying the nameplate on the old unit.
Trane Comfort Specialist and Mitsubishi Diamond Contractor Elite
Both top manufacturer tiers, which matters most on warranty work: manufacturer standing affects how registration and extended terms are handled on the system you actually bought.
Attic duct testing before we quote equipment
On a warm afternoon an attic runs far hotter than outside. A supply leak loses conditioned air and a return leak pulls that heat straight into the system. Testing first is the difference between fixing the problem and buying around it.
The price is agreed before work starts
You see the number before the work begins, including what the duct findings mean for the quote. Ongaro & Sons has been family-owned in Marin, Sonoma and Napa since 1932 and Diamond Certified since October 2016.
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
How can I improve my air conditioner’s efficiency?
Tips to save on cooling costs this summer: Change air filters regularly Use a programmable or smart thermostat Keep blinds or curtains closed during the day Seal air leaks around doors and windows Improve insulation in the attic and/or crawlspace Schedule regular AC service and tune-ups Replace old units with an energy-efficient model
How often should I maintain my AC/cooling equipment?
Regular maintenance is crucial to keep your system running efficiently and to maintain your warranty. It’s akin to regular oil changes for a vehicle. Your air conditioner or air handler should be inspected and maintained annually. Your heat pump should be inspected biannually, once in the spring and again in the fall.
What size air conditioner do I need for my home?
The right size AC depends on your home’s square footage, insulation, number of windows, and more. An HVAC technician from Ongaro & Sons will perform a load calculation to determine the ideal size of the air conditioning system for comfort and efficiency.
Why is my AC blowing warm air?
Your AC may be blowing warm air because of low refrigerant, a dirty coil, clogged air filters, or a thermostat issue. Let the team at Ongaro & Sons diagnose the problem and get your home cool again.
Why is my air conditioner freezing up?
Ice buildup could be caused by dirty filters, low refrigerant, or poor airflow. To avoid further damage, turn the system off and call Ongaro & Sons for AC repair.