Los Altos HVAC Company handles heating and cooling work for homes and businesses across Los Altos and the wider Santa Clara County area. Whether a furnace has stopped working in the middle of January, a central air system is struggling through a July afternoon, or a property manager needs a rooftop unit diagnosed before tenants start calling, we take the call and scope the job before anything is scheduled. Residential HVAC. Commercial HVAC. One number for both.
Every job is carried out to code, and we confirm the price before any work begins. We are open every day from 9:00 AM to 8:00 PM, so there is a real window to reach us when something goes wrong. Call us and we'll handle the rest.
From aging systems to brand-new installs, the heating and cooling work in this area covers a wide range of property types and situations. Older ranch homes in Los Altos with original ductwork, newer construction with multi-zone systems, commercial suites in mixed-use buildings, small business offices running a single rooftop unit: each one has different equipment, different failure points, and different priorities when something goes wrong.
On the residential side, we handle AC repair and service, furnace repair, heat pump repair and installation, ductless mini-split systems, thermostat and smart-control installation, ductwork repair and sealing, indoor air quality, and seasonal maintenance. If a system is past the point of repair, we scope full HVAC replacement and walk through what the new equipment involves before anything is agreed.
On the commercial side, the work includes office and retail HVAC repair, commercial AC service, commercial heating, and rooftop unit diagnosis and repair. Small business owners and property managers can reach us on the same number as residential callers. We'll get your comfort back on track.
The Bay Area's climate shapes what breaks, when it breaks, and what equipment makes sense here. The sections below cover the three services that come up most often in this area.
Summers in Los Altos are warm and dry, and a central air system that is not performing correctly makes that heat hard to manage indoors. The most common calls come in when an AC stops cooling altogether, when it is blowing warm air despite running, when it short-cycles on and off without reaching temperature, or when it starts making a noise it did not make last season.
The diagnostic work covers refrigerant levels and leak points, condenser coil condition, compressor operation, and airflow through the air handler and supply registers. A system that is low on refrigerant is not just less effective: it is working harder than it should, which shortens the life of the compressor. Getting the diagnosis right matters more than getting the repair done fast. The system is tested before the visit ends, so there is a confirmed result before the technician leaves the property.
Santa Clara County winters are mild enough that a heat pump handles the heating load comfortably without the fuel costs of a gas furnace. That makes heat pumps a practical fit for a lot of Los Altos properties, both as replacements for aging systems and as first installs in homes that have relied on electric resistance heat.
When a heat pump stops working, the diagnosis covers the refrigerant cycle, the reversing valve that switches the system between heating and cooling modes, the defrost cycle, and airflow balance across the indoor and outdoor units. A reversing valve that is stuck in one position, for example, will leave the system cooling when the thermostat is calling for heat, or vice versa. Entry points for a service call include a heat pump that is not heating or cooling, uneven temperatures across rooms, or an energy bill that has climbed without an obvious reason. We're one phone call from getting your comfort right.
A significant share of homes in Los Altos were built before central ducted systems were standard, and many have had additions, garage conversions, or home offices added over the decades. Those spaces often have no ductwork at all. A ductless mini-split handles heating and cooling for a single zone without requiring a duct run, which makes it a practical option for exactly those situations.
Installation involves routing a refrigerant line set between the outdoor unit and the indoor air handler, placing the air handler where it covers the space without creating a draft problem, and commissioning the refrigerant charge to the manufacturer's specification. Repair calls cover refrigerant leaks, drainage blockages at the indoor unit, remote and control board faults, and airflow problems from a dirty or blocked filter. Rooms that are not cooling or heating evenly, or a space that has no existing ductwork, are the most common reasons to start the conversation.
Before a small issue turns into a full breakdown, it is worth knowing what the full range of work covers. The services below are available for residential and commercial properties across the area.
Furnace repair, service, and replacement. A furnace that is blowing cold air, making a banging or rattling sound, or cycling on and off without reaching temperature is telling you something specific. The diagnostic covers the heat exchanger, igniter, flame sensor, and control board, among other components. If a furnace needs replacement rather than repair, we scope that out on the same call.
Full HVAC system installation and replacement. When a system reaches the end of its useful life, a full replacement is often the more practical path. We size the new equipment to the property, confirm what the installation involves, and walk through the options before anything is agreed.
Thermostat and smart-control installation. A thermostat that is not reading the temperature accurately, or a system that is running on an old programmable unit when a smart control would improve efficiency, is a straightforward upgrade. We handle wiring, configuration, and testing as part of the same visit.
Ductwork repair and sealing. Leaky ducts lose conditioned air before it reaches the rooms it is supposed to serve. That shows up as uneven temperatures, higher energy bills, and a system that runs longer than it should. Duct sealing addresses the leaks directly rather than asking the equipment to compensate.
Indoor air quality and air filtration. Options include whole-home air filtration, UV air purifiers installed in the air handler, and upgraded filter media. The right choice depends on the existing system and what the occupants are trying to address.
Seasonal maintenance and tune-ups. A spring AC tune-up checks the system before the first hot days arrive. A fall heating tune-up does the same before the cold sets in. Annual service catches the small problems before they become the expensive ones.
You do not need to know what is wrong before you call. Describing the symptom is enough to start the conversation, and the job gets scoped from there. Every visit includes clear notes on what was found and what was done, so there is a record of the work for future reference. We'll confirm the repair with you before it goes ahead.
When the heat or the AC quits, the situation is urgent in a way that a slow-starting system is not. No heat in the house on a cold night, a furnace that has stopped mid-cycle, an AC that has gone completely silent on a warm afternoon: those are the calls that cannot wait for a scheduled appointment.
We are open every day from 9:00 AM to 8:00 PM. When you call during those hours, someone who knows the trade picks up. The job is scoped on the call, and the price is confirmed before anything is scheduled. What the visit covers and what it costs are both settled on the call, before anyone is scheduled.
Common emergency entry points include a furnace not working, a heater blowing cold air, an AC that has stopped cooling entirely, or a system that is making a sound that suggests something has failed mechanically. Whatever the symptom, the call starts the same way: describe what the system is doing, and we work through what the visit covers from there. One call. One clear diagnosis. One price, agreed first.
The hardest part of an HVAC problem is knowing when to call, and the second hardest is not knowing what it is going to cost. Pricing for HVAC work varies with the system type, the age of the equipment, the scope of the repair or replacement, and the parts involved. There is no single number that applies to every job, which is why we confirm the rate on the call rather than publishing a price list that will not match what the visit actually involves.
What the call covers: the scope of the work, what the visit includes, the price before anything is scheduled, and any questions about the repair or replacement options. If a system is at the point where repair and replacement are both on the table, that conversation happens on the call so the decision is an informed one.
What affects the final price includes the type of equipment, whether parts need to be sourced, how accessible the system is, and whether additional work is uncovered during the diagnostic. All of that gets factored in before the work goes ahead, not after. Work is carried out to code on every job, and the scope is confirmed before the technician starts.
Noticing uneven temperatures or a spike in energy bills? Whether the property is in Los Altos or a neighboring city, the work and the process are the same. We cover residential and commercial properties across the area, and the call is handled the same way regardless of where the job is located.
Communities we serve include:
Both homeowners and commercial property managers across Santa Clara County can reach us on the same number. If you are unsure whether your address falls within the area, ask on the call and we will confirm it directly. We're one phone call from getting your comfort right.
We serve Los Altos as our primary area and work throughout Santa Clara County. That includes Mountain View, Sunnyvale, Cupertino, Palo Alto, Los Altos Hills, Menlo Park, and Saratoga for both residential and commercial properties.
If your address is not on that list, call (650) 955-4592 and we will confirm whether it falls within our service range.
The work starts with a confirmed scope and price before anything begins, moves through the repair or installation, and ends with the system tested across the relevant modes before the technician leaves. You receive clear notes on what was found and what was done, so the visit is documented rather than just remembered. Nothing is closed out until the system is confirmed to be operating correctly.
The technician will review the scope that was confirmed on the call, inspect the equipment, and walk through the diagnosis before any repair work begins. If the diagnostic changes the scope, the updated price is explained and confirmed before proceeding. The visit ends with a system test and a review of what was found and what was done.
Every visit ends with the system tested through the relevant operating modes, whether that is heating, cooling, or both, before the technician leaves the property. That confirms the repair addressed the actual problem rather than a symptom of it. If the test turns up something else, it is noted and discussed before the visit closes.
If a part needs to be sourced or a second visit is required to complete the work, that is explained clearly before the technician leaves. We confirm what was completed, what remains, and what the next step involves so there is no ambiguity about where the job stands. A follow-up visit is scheduled before the first one closes where possible.
The technician works around the equipment and takes care not to damage floors, walls, or finishes during the visit. If the job involves moving through finished areas of the home to reach the equipment, that is handled with attention to the space. Any concerns about specific surfaces or areas are worth raising when you book so they can be noted for the visit.
Before any work begins, the scope is confirmed, the price is agreed, and you are told what the visit covers. Work is carried out to code on every job, and the repair or installation is not considered complete until the system has been tested. Those are the commitments that apply to every visit, repair, and installation we handle.
The diagnostic is the first step on every visit, and no repair is quoted until the cause is identified. A symptom like warm air from the vents or a system that short cycles can point to several different problems, and chasing the right one matters more than moving quickly to a part replacement. The scope and the price are confirmed based on what the diagnostic actually finds.
Permit requirements for HVAC work in Los Altos depend on the scope of the job. Full system replacements and new installations typically require a permit through the city or county, while repairs and component-level work often do not. We confirm what applies to the specific job before work begins, and all work is carried out to the code standards that govern this area.
Los Altos HVAC Company is available every day from 9:00 AM to 8:00 PM for heating and cooling work across Los Altos and the surrounding area. Whether the job is a repair, a replacement, a seasonal tune-up, or a system that has stopped working entirely, the call is where it starts.
Clear answers. Real pricing. Real fast response.
Every job comes with clear notes on what was found and what was done, so you know exactly what happened and what was agreed.
Call (650) 955-4592 to get a quote, scope the job, and confirm the price before anything is scheduled. We're one phone call from getting your comfort right.
(650) 955-4592