Our Service Areas

Oakland HVAC — Heating & AC Repair, Installation & Service

Local Heating, Air Conditioning & Energy Efficiency Experts

Oakland homes are not all the same, and neither are their heating and cooling problems. A 1920s Craftsman in Temescal with a wall furnace and no ductwork needs a completely different approach than a hillside home in Montclair running a 15-year-old heat pump. Hassler Heating and Air Conditioning has worked across the East Bay since 1999, and our technicians know Oakland's housing stock well enough to tell you what your system actually needs instead of defaulting to a replacement quote.

As a full-service HVAC contractor in Oakland, we repair and replace furnaces, service and install air conditioning, and install heat pumps and ductless mini-splits. We also handle the duct sealing and insulation work that frequently turns out to be the actual reason a house will not hold temperature. Our phones are answered around the clock.

Need HVAC service in Oakland today? Call (510) 288-5563 or schedule online.

Heating & Furnace Repair in Oakland

When the heat goes out in October or November, Oakland's mild reputation stops being much of a comfort. The hills get genuinely cold at night, and a lot of the city's older housing has minimal insulation working against it. We offer same-day heating repair across Oakland and keep our service vehicles stocked for the failures we see most.

Common Heating Problems We See in Oakland Homes

Most of the no-heat calls we take in Oakland trace back to the same handful of failures. A few of them you can rule out yourself before you call us.

The furnace runs but blows cold air. The cause is usually a thermostat setting, a clogged filter, a failed ignitor, or a dirty flame sensor. A cracked heat exchanger can also do it, and that is a same-day safety call.
The furnace short cycles. It turns on and off every few minutes, which wastes fuel and wears out the ignition components early. Usually a dirty filter or flame sensor, though sometimes the furnace was simply oversized when it went in.
Heat is uneven between floors. In older Oakland homes this almost always traces back to leaky or undersized ducts rather than the furnace itself.
A wall furnace or floor furnace has quit. Many of Oakland’s pre-war homes have no ductwork and still heat through these units, which typically fail at the pilot assembly, the thermocouple, or a blocked vent. We service and replace wall and direct vent heaters, though parts for discontinued models can be scarce enough that replacement is the better call.
Other common repairs. Blower motors, capacitors, gas valves, control boards, thermostat wiring, boilers and hydronic systems, and heat pump defrost or reversing valve faults.

Call Hassler Heating and Air Conditioning today at (510) 288-5563 to schedule an appointment with us!

Furnace Replacement & Heating Installation in Oakland

Some furnaces are worth fixing. Some are not. Here is where we would lean toward replacement:

The repair costs more than about half the price of new equipment
The unit is past 18 to 20 years and has needed service two or three winters running
There is a cracked heat exchanger, where replacement is almost always the better call
Heating bills keep climbing with no change in how you use the system
The furnace was oversized or undersized from the start and has never heated the house evenly

If you are replacing anyway, it is worth asking whether you want another gas furnace at all. California's incentive programs currently favor electric heat pumps heavily enough that the net cost difference is often smaller than people expect. We install high-efficiency furnaces for homeowners who want to stay with gas, and we will give you a side-by-side comparison rather than pushing you one direction.

Every installation is permitted and inspected where Oakland requires it, and we handle the permit paperwork.

Heat Pump Installation in Oakland

If you are replacing an aging furnace and air conditioner at the same time, or you want to move off gas, a heat pump does both jobs in one all-electric system. For many Oakland homeowners it is the HVAC installation that makes the most sense, because it replaces two pieces of equipment with one.

Oakland’s climate suits heat pumps about as well as any in the country. Winters rarely get cold enough to push a modern unit out of its efficient range, so most homes here do not need a gas backup.

When Oakland homeowners choose a heat pump over another gas furnace, it usually comes down to three things.

Lower operating cost, and one system instead of two. A heat pump moves heat rather than burning fuel to create it, so it delivers several times more heating energy than the electricity it uses, and it handles your cooling on the same equipment.
Steadier comfort. Inverter-driven units modulate output continuously instead of cycling full-on and full-off, which means fewer temperature swings.
Incentives for going all-electric. Replacing fossil-fuel heating currently qualifies for several stacked rebate and credit programs. As a TECH-Enrolled and BayREN Participating Contractor, we handle the paperwork and apply everything you qualify for before you commit. See our rebates page for current programs.

The Hassler Difference

Hassler knows that getting the job done right today will lead to customers being our biggest advocates tomorrow.

Exceeding Expectations

Our philosophy on customer service is to not only meet expectations but to exceed them. Whether it is your home heating and cooling, improving your indoor air quality, or scheduling a home energy assessment, we are committed to over-delivering throughout your entire journey with Hassler.
Leadership
From our newest team member on up to our leadership and ownership, we are committed to producing the highest level of workmanship - all in an efficient manner. We accomplish this through better training, education, planning, and leadership across all the products and services we provide.
Accountability

We are committed to holding ourselves and each other accountable to integrity, customer satisfaction, and peak performance. We are unwavering in our commitment to not only talk about the solution, but to be a part of it.
Lasting Relationships
Developing long lasting relationships is at the core of our organization. When interacting with a customer or team member, we are committed to building mutual trust and respect. Our reputation is the foundation of the company, and at the end of the day, our word is all we have!
Growth

Through a dedication to training, education and leadership, we will continue to grow to remain the leading HVAC and home performance company in Contra Costa, Alameda, and Marin counties. We are continually honing our craft and challenging ourselves to improve who we are as an organization for what we can become.
Go Green
We care deeply about the changing climate here in California, and want to help other Californians reduce their impact on the environment. Hassler places an emphasis on embracing “Green” technologies and processes whenever possible, and reducing energy use.

Learn more

Air Conditioning Repair in Oakland — Fast, Local Service You Can Count On

Oakland's climate puts a unique strain on air conditioning systems. The Bay's humidity keeps equipment running longer into the season, while summer heat spikes — especially inland near Temescal and the hills — push older units past their limits. When your AC starts acting up, Hassler Heating and Air Conditioning has the trained technicians and same-day availability to fix it fast. We handle air conditioner repair throughout Oakland, from the flatlands to the hills.

Common AC Failures We See in Oakland Homes

Air conditioners tend to fail in predictable ways, and in Oakland they usually fail during the first real heat spike of the summer. These are the problems we get called out for most.

An aging central system is losing capacity. Many Oakland homes, especially the Craftsman bungalows and Victorian flats in Rockridge, Piedmont Avenue, and Adams Point, still run central AC that is 15 to 20 years old. Worn compressors, cracked heat exchangers, and failing blower motors are all common at that age, and we will tell you honestly whether a repair is worth the money.
Refrigerant is low or leaking. This is one of the most frequent causes of weak cooling. The signs are ice forming on the refrigerant lines, warm air from the vents, and a jump in your energy bill. Our technicians are EPA-certified to locate leaks and recharge the system to spec.
A capacitor has failed. Start and run capacitors fail more often than anything else in an AC system, usually right when summer heat peaks, and the system either will not start or starts and shuts down seconds later. This is typically a same-day fix.
Other common repairs. Frozen evaporator coils, dirty or failing condenser coils, faulty contactors and relays, clogged condensate drain lines, thermostat and control board faults, and blower motor failure.

Air Conditioning Installation & Replacement in Oakland

If your air conditioner is more than 12–15 years old, needs repeated repairs, or simply can't keep up with your home's cooling load, it may be time for a replacement. A modern, properly sized system will cool your Oakland home more effectively, run more quietly, and cut your energy costs — often significantly.

Signs It's Time to Replace Your AC

No single item on this list means you need a new air conditioner. Two or three of them together usually does.

The system runs constantly but never quite reaches the temperature you set, especially during a heat spike.
Cooling is uneven between rooms or between floors.
The unit runs on R-22 refrigerant. Production was phased out in 2020, so both the refrigerant and the replacement parts are scarce and expensive.
You have needed refrigerant added more than once. That means a leak somewhere in the system, and on older equipment the repeated charges frequently add up to more than a replacement would have cost.
The air feels damp even when the thermostat reads right, or the system has gotten noticeably louder than it used to be.

Our AC Installation Process

Sizing is the part that matters most and the part most often done badly. We measure your home’s square footage, insulation, sun exposure, and existing ductwork rather than matching whatever was there before. An oversized system short-cycles and leaves the air clammy, while an undersized one runs constantly and never quite catches up. From there we handle the refrigerant, electrical, and duct work to code, pull the permit where Oakland requires one, and commission the system before we leave.

Installing AC in an older Oakland home often means dealing with ductwork that was added decades after the house was built, or is not there at all. We will tell you up front whether your existing ducts can carry the airflow a new system needs. Request a free in-home estimate or call (510) 288-5563.

Ductless Mini-Split Installation in Oakland

Many older Oakland homes have no ductwork at all, and a ductless mini-split is usually the most practical answer. We install single-zone systems for one problem room and multi-zone systems that handle a whole house. Because mini-splits heat as well as cool, they also work as a direct replacement for a failing wall furnace. Learn more about ductless mini-splits.

Duct Repair & Indoor Air Quality in Oakland

If some rooms never get comfortable no matter what the thermostat says, the ducts are a likely culprit before the equipment is. Ductwork in Oakland's older homes is often undersized, poorly sealed, or routed through unconditioned crawlspaces and attics where it loses a large share of the air it is carrying. Hillside homes in Eastmont Hills, Skyline-Hillcrest Estates, and the Oakland hills frequently have long duct runs that make the problem worse.

We offer duct repair and sealing, duct cleaning, and home energy assessments that identify where your home is losing conditioned air. For the wildfire smoke season, we also install air purifiers and upgraded filtration.

Oakland Neighborhoods We Serve

We work throughout Oakland, including:

Rockridge · Temescal · Montclair · Piedmont Avenue · Adams Point · Grand Lake · Lakeshore · The Laurel · Dimond · Glenview · Fruitvale · West Oakland · Jack London Square · Eastmont Hills · Skyline-Hillcrest Estates · Crocker Highlands · Maxwell Park · Redwood Heights

We also serve surrounding cities across Alameda, Contra Costa, and Marin counties. See our full service area.

What to Expect When You Call Us

Every service call we run in Oakland works the same way, whether it is a furnace in December or an air conditioner in August.

Same-day diagnostic. A technician comes to your Oakland home, tests the system, and identifies the fault. You get a straight explanation, not a sales pitch.
A written price before work starts. You see an itemized number and approve it before anything gets touched.
Repair in one visit wherever possible. Our trucks carry the parts that fail most often, including ignitors, flame sensors, capacitors, contactors, and thermostats.
A full test before we leave. We run the system through a complete cycle and confirm it is operating within spec. On any gas appliance, that includes a combustion safety check and a heat exchanger inspection.
Honest repair-versus-replace guidance. If a repair does not make financial sense on a 22-year-old system, we will say so and show you the math, then let you decide.

Same-Day Heater & AC Repair in Oakland

A house with no heat in January, or no cooling during a July heat spike, needs a technician today rather than an appointment next week. Call (510) 288-5563 and we will get you on the schedule. Our phones are answered 24 hours a day, urgent no-heat and no-cooling calls go to the front of the line, and most of these repairs are finished on that first visit.

Why Oakland Homeowners Choose Hassler

Most HVAC companies in Oakland can swap out a furnace. The differences show up on the jobs that are not that simple.

Licensed and local since 1999 (California contractor license #770180). We are a full-service HVAC company operating out of El Cerrito, and we have served Oakland and the East Bay for more than 25 years.
Technicians who know older housing. A lot of HVAC companies would rather sell you a new system than work on a floor furnace. We do both, and we will tell you honestly which one you need.
Heat pump and electrification specialists. Electrification is a core part of our business rather than a line item, and we stay current on incentive programs that change from year to year.
A whole-home perspective. Heating and cooling complaints in Oakland homes are frequently insulation, duct, or air-sealing problems. We can assess the whole building envelope instead of only swapping equipment.
24/7 phone coverage. Our phones are answered at any hour, including nights and weekends.

Read what Oakland customers say on our reviews page.

Financing, Rebates & Current Offers

HVAC replacement is a real expense, and we would rather talk about it directly than leave you to figure it out at the end of an estimate.

We offer financing through multiple lenders, including 0% interest for 18 months on qualifying projects. Oakland homeowners may also qualify for PACE (Property Assessed Clean Energy), which finances energy-efficiency improvements through your property tax assessment rather than a conventional loan.

On top of financing, heat pump and electrification projects may qualify for utility and state rebate programs. Program amounts and eligibility change, so we confirm what is currently available and apply it to your estimate before you sign anything.

See financing options, current rebates, and this month's specials.

Whether your heat quit overnight, your AC cannot keep up, or you are weighing a heat pump against another gas furnace, we will give you a straight assessment and a written price. Call Hassler Heating and Air Conditioning at (510) 288-5563 or contact us online.

Frequently Asked Questions: HVAC Repair & Installation in Oakland

How much does heater repair cost in Oakland?

Most heating repairs in Oakland fall somewhere between $150 and $600. Things like ignitors, flame sensors, thermocouples, capacitors, and thermostats sit at the lower end. Bigger jobs run higher: a gas valve, control board, blower motor, or heat exchanger replacement can be considerably more, and at that point we would usually want to talk through whether replacement makes better sense. Cost depends on the equipment's age, brand, and how accessible the components are. You will get a written quote before any work starts. Call (510) 288-5563 for a diagnostic.

My furnace is blowing cold air — what's wrong?

If the furnace is running but only pushing cold or lukewarm air, check two things first: your thermostat may be set to "fan on" instead of "auto," which circulates air continuously even when the heat isn't firing, and a clogged air filter can trip a high-limit safety switch that shuts off the burners while the blower keeps running. Beyond those, it's likely a failed ignitor, a dirty flame sensor that won't confirm the burner has lit, a faulty gas valve, or — in older furnaces — a cracked heat exchanger, which is a safety issue that warrants immediate attention. If cycling the thermostat and swapping the filter doesn't fix it, call Hassler Heating and Air Conditioning at (510) 288-5563 for a same-day diagnostic.

How much does AC repair cost in Oakland?

AC repair costs in Oakland typically range from $150–$600 for most common repairs, though more involved jobs — compressor replacement, refrigerant leak repair with recharge, major electrical work — can run higher. Prices vary based on your system's brand, age, component accessibility, and parts availability. Hassler Heating and Air Conditioning provides a written, upfront quote before any work begins. Call (510) 288-5563 for a diagnostic appointment.

Why is my AC running but not cooling my Oakland home?

A few things could be going on. The most common culprits are low refrigerant from a slow leak, a dirty evaporator or condenser coil that can't transfer heat efficiently, a failing compressor, or a frozen evaporator coil caused by restricted airflow. It's also worth checking whether your thermostat is set correctly and your air filter isn't completely clogged — a severely restricted filter can starve the system of airflow and cause the whole thing to underperform. If the basics check out and it's still blowing warm, it's time for a diagnostic.

How often should I have my HVAC system serviced in Oakland?

Twice a year is the standard recommendation — once in spring before cooling season and once in fall before heating season. Oakland's climate is mild enough that many homeowners skip annual maintenance, but that's usually how small issues turn into expensive repairs. AC maintenance in the spring covers coil cleaning, a refrigerant check, electrical inspection, and airflow testing. A fall tune-up covers your furnace or heat pump: heat exchanger inspection, burner cleaning, ignition testing, filter replacement. Hassler offers maintenance plans that cover both visits and include priority scheduling.

How long does an HVAC system last in the Oakland area?

Central AC units and gas furnaces both average 15–20 years with proper maintenance. Heat pumps typically land in the 15-year range. Ductless mini-splits can push past 20 years when serviced regularly. Oakland's relatively mild climate works in your favor — systems here don't run as hard as they would in Phoenix or Chicago, which extends equipment life. That said, age alone isn't the only factor. A 12-year-old unit that's been well-maintained and correctly sized may have years of reliable life left; a 10-year-old unit that's been neglected or was undersized from the start may already be on borrowed time.

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"Professional, efficient and responsive."
“We highly recommend Hassler Heating and AC. Three years ago, we updated our system with a heat pump. The installers were professional, efficient and responsive.”

- Diane M.
"The company provided great service."
“He quickly identified the problem, took time to explain it, answered my questions and got everything in working order under 2 hours that even included a trip back to El Cerrito to get the right part. He was very courteous and respectful.”

- Veronica A.
"He had us up and running very quickly."
“He had us up and running very quickly and also was able to make some other recommendations for service and maintenance. He was great, and I will continue to use him and his team for maintenance and repairs.”

- Scott L.
"I am so thankful."
“Hassler Heating went above and beyond customer service! My AC unit started smoking and I called to make an appointment and they were able to fit me into their schedule that day!”

- Emily V.
"I also want to commend your work crew."
“They were very efficient as well as pleasant in their interaction with me. They did such a good job that my next-door neighbor, after watching them at work, told me that he has decided to hire your firm to install a new heating system for his house.”

- Marilyn B.
"Very knowledgable."
“Chris just came out and inspected a furnace and ducting for me at a property that clients of mine are purchasing in El Cerrito. He was very knowledgable and was sure to take the time to answer all of my questions thoroughly.”

- Jeffery S.
"We have full confidence."
“We have full confidence that we now have a first class heating system that will serve us well in the years to come. We know in the future we will need to replace our roof mounted air conditioner, and we will confidently call on Hassler to do the job.”

- Tom R.
"Always professional."
“They squeezed a whole lot of equipment into a tiny attic without a single complaint. They also helped with all of the energy-saving rebates . The estimator, installers, and service guys have been great.”

- Sean M.

Financing Options, Including PACE for Oakland Homeowners

We understand that HVAC repairs and upgrades can be a significant investment. That's why Hassler Heating and Air Conditioning offers various financing options, including the Property Assessed Clean Energy (PACE) program, which is available to many Oakland homeowners. PACE can help you finance energy-efficient home improvements through your property taxes, making it more accessible to enhance your comfort and save money in the long run.

Turn to the pros at Hassler Heating and Air Conditioning for energy-efficient HVAC upgrades and services throughout Oakland and beyond! Call Hassler Heating and Air Conditioning or contact us online to get started.

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