AC Replacement in San Francisco, San Jose and the North Bay: How to Choose a Company After a Breakdown

Jacob Construction replaces air conditioning and installs new heating and cooling systems for homeowners in San Francisco, San Jose, Vallejo, San Rafael and across the North Bay, from our office in Sausalito. If your AC has quit during a hot stretch, we'll do a free assessment, tell you honestly if a repair makes more sense than replacing it, give you a written quote, and offer financing options for approved homeowners.

Bay Area heat doesn't come often, which is exactly why a breakdown catches people off guard. This guide covers what to do in the first day or two, how AC replacement in San Francisco differs from San Jose and the North Bay, and how to pick a company you'll be glad you hired once the heat has passed.

At a glance

• We replace AC and install heat pumps in San Francisco, San Jose, Vallejo, San Rafael and the wider North Bay.
• Get a written diagnosis first. Not every breakdown means a new system.
• San Francisco homes often have no ducts or old ducts, so the right system may look different from a typical suburban install.
• San Jose and inland North Bay homes face longer heat waves, and system size matters more there.
• Financing is available for approved homeowners. Financing isn't free and is subject to approval.

The First Day or Two After Your AC Breaks Down

When the house is hot and the AC won't run, the instinct is to call whoever can come soonest and agree to whatever they recommend. Slow down just enough to protect yourself:

1. Rule out the easy fixes. Check the thermostat, the breaker and the air filter.
2. Ask for a diagnosis in writing. What failed? Is it a part that can be replaced, or is the system at the end of its life?
3. Get the repair price and the replacement price side by side. If a company quotes only replacement, ask why repair isn't an option.
4. Keep the household cool in the meantime. Spend the hot afternoon hours somewhere with air conditioning if anyone at home is vulnerable to heat.

Our guide My AC died in the Bay Area: finding a contractor you can trust walks through how to find a contractor when you're under pressure.

Who to Call for AC Replacement in San Francisco

In San Francisco, many homes were built without air conditioning, and plenty still heat with an old wall furnace or a gravity furnace with large, aging ducts. If your home has AC at all, it may be a system someone added years ago. That makes the replacement decision different from a newer suburban house:

• Ducts may be missing, undersized or in the wrong places, especially in older homes and flats.
• Space is tight. Where the outdoor unit can go, and how lines get to it, is often a real question on a narrow lot.
• You may need heating more than cooling for most of the year, which is why many homeowners look at a heat pump that does both.

Ask each company to explain how its recommendation fits your actual house, not a generic one. A heat pump is often worth quoting next to a conventional AC, because it can replace an old furnace too. When you request a free assessment, we can quote both so you can compare. See our heating and cooling services for what we install.

California's energy code can apply when you replace heating and cooling equipment, and requirements come up as part of the permit. The California Energy Commission publishes the standards. We handle the permits and paperwork on roughly 90% of our jobs, so you don't have to work through them yourself.

AC Replacement in San Jose During a Heat Wave

San Jose gets far more heat than San Francisco, and a system that fails in a multi-day heat wave needs a decision quickly. A few things are different there:

• Size matters more. A system that's too small will run all afternoon and still fall behind on very hot days. One that's too big cycles on and off and leaves rooms clammy. Ask how the size was calculated, not just what the old unit was.
• Attics get very hot. Ducts running through a hot attic lose cooling before it reaches the rooms. Ask whether the ducts and attic insulation are part of the problem.
• Timing is real. In a heat wave, ask each company when the equipment is actually available and when installation can be scheduled, not only when someone can come out.

We replace AC systems in San Jose, and the same project manager who assesses your home stays your contact through installation and the final walkthrough.

Vallejo, San Rafael and the North Bay

The North Bay ranges from foggy and mild near the water to hot inland. Vallejo and inland parts of Marin and Solano get real summer heat, while homes close to the bay may need cooling only a few weeks a year. That affects what's worth buying.

If you only need cooling on a handful of days, a modest, well-sized system or a heat pump that also handles winter heating may be the better value. If your summers are long and hot, the system needs to be sized for that. Our Sausalito office means North Bay homes are close by for us, from San Rafael to Vallejo.

How to Choose a Company You Can Rely On

Once the immediate heat has passed, what you'll care about is whether the company did what it said. Before you sign, check that:

• The license is current. Look it up on the California Contractors State License Board site.
• The quote is written and itemized: equipment model numbers, capacity, ducts, electrical work, permits, removal of the old unit and the total price.
• You know who your contact is. Ask who you'll call if something goes wrong in week two.
• Equipment coverage is in writing. The systems we install carry manufacturer warranties of 15–25 years. Ask for the manufacturer's terms.
• Change orders are explained. Ask how you'll approve any extra work before it's done.

For a longer list, read how to choose an HVAC contractor in the Bay Area.

Why Bay Area Homeowners Call Jacob Construction

We've been doing this since 2021. Jacob Construction holds an A+ rating with the Better Business Bureau and is licensed in California, License #1073757. The person who quotes your job is your project manager from start to finish, and we take care of permits and paperwork on most jobs. A Fremont customer described our work as "professional, punctual, and very thorough."

Paying for a Replacement You Didn't Plan For

An AC breakdown is rarely in the budget. Financing is available for approved homeowners, with monthly payment plans set up to fit a household budget. Financing isn't free and is subject to approval. Our guide to financing a new AC system explains how it works.

Frequently Asked Questions

Does Jacob Construction replace AC systems in San Francisco and San Jose?

Yes. We replace air conditioning and install heat pumps in San Francisco, San Jose and across the Bay Area.

Who installs new heating and cooling systems around Vallejo and the North Bay?

We do. Our office is in Sausalito, and we install heating and cooling systems in Vallejo, San Rafael and the rest of the North Bay.

Should I repair or replace my AC after it breaks down?

It depends on what failed and the age of the system. Ask for a written diagnosis that compares repair with replacement. We'll tell you honestly if a repair makes more sense than a new system.

Is a heat pump a good fit for a San Francisco home?

Often, yes, because most San Francisco homes need heat more than cooling, and a heat pump does both. Whether it fits depends on your ducts, electrical panel and space for the outdoor unit, which we check during the assessment.

Can I finance an AC replacement?

Yes. Financing options are available for approved homeowners. Financing isn't free and is subject to approval.

Get an AC Assessment in San Francisco, San Jose or the North Bay

If your AC has quit or is on its way out, request a free assessment or contact us, or call (415) 779-8958. We'll diagnose the system, explain your options for AC replacement in San Francisco, San Jose or the North Bay, and give you a written quote with financing options. Financing is subject to approval.