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4.8on Google· 3,200 reviewsObserved September 30, 2026
Based in Sylmar
Dutton provides air conditioning and heating services, including AC breakdowns and upgrades, plus furnace repair, replacement and maintenance.
4.9on Google· 1,700 reviewsObserved September 30, 2026
Based in Chatsworth
Affordable Heating and Air provides heating and cooling repairs, installations and maintenance across Los Angeles and Ventura counties, with specialties including heat pumps and indoor air quality systems.
4.9on Google· 1,600 reviewsObserved September 30, 2026
Based in Van Nuys
Kahn Air Conditioning provides heating and cooling repair, installation and maintenance in Van Nuys and the San Fernando Valley, with a specialty in Carrier equipment.
4.5on Google· 1,300 reviewsObserved September 30, 2026
Based in Northridge
SoCal Climate Control Heating & Air Conditioning provides heating, cooling and indoor air quality services for homes and businesses, including heat pump installation and repair and duct cleaning.
4.7on Google· 1,200 reviewsObserved September 30, 2026
Based in Chatsworth
Service Genius Air Conditioning and Heating is a family-owned HVAC company whose Chatsworth branch repairs, maintains and installs home and business heating and cooling.
4.8on Google· 801 reviewsObserved September 30, 2026
Based in North Hollywood
4.9on Google· 670 reviewsObserved September 30, 2026
Based in Woodland Hills
LA Heating & Air Conditioning is a Woodland Hills heating and cooling contractor working for homes and businesses across the San Fernando Valley and greater Los Angeles.
4.8on Google· 629 reviewsObserved September 30, 2026
Based in Tarzana
4.9on Google· 575 reviewsObserved September 30, 2026
Based in Sherman Oaks
4.8on Google· 516 reviewsObserved September 30, 2026
Based in Canoga Park
4.9on Google· 449 reviewsObserved September 30, 2026
Based in Panorama City
LA Air Department repairs, installs and maintains heating and cooling systems for homes and businesses.
4.8on Google· 393 reviewsObserved September 30, 2026
Based in Van Nuys
JMS Air Conditioning and Heating is a Van Nuys HVAC contractor that repairs, services and installs heating and cooling systems of every make.
5.0on Google· 365 reviewsObserved September 30, 2026
Based in Northridge
5.0on Google· 337 reviewsObserved September 30, 2026
Based in North Hollywood
North Hollywood heating and air conditioning contractor that repairs, installs, replaces and maintains systems for homes and light commercial clients.
4.9on Google· 309 reviewsObserved September 30, 2026
Based in Woodland Hills
Ultimate Air is a Woodland Hills HVAC contractor that tunes up, repairs and replaces heating and cooling systems for homes, businesses, factories and warehouses.
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43 ZIP codes, 555,239 households (ACS 2020-2024)
Heating and cooling faults fall into four groups. Electrical: a tripped breaker or a failed small part such as a capacitor. Airflow: a clogged filter, a frozen coil or leaking ducts. Refrigerant: a leak, which should be found and fixed, not just topped up. The equipment itself: a failed compressor, or a cracked heat exchanger in a gas furnace, which can put carbon monoxide into the home and means the furnace stays off until it is replaced. A diagnosis should name which, in writing, before any repair-or-replace conversation.
Replacement is a design job, not a swap. The right size comes from a load calculation (ACCA Manual J) based on the home's insulation, windows, orientation and ducts. It should not be copied from the old unit, which was often the wrong size. Oversized systems switch on and off too often, cool unevenly and fail early. Ducts matter as much as the equipment: leaky or undersized ducts waste much of what the system produces.
Replacing a system needs a mechanical permit from your city's building department; in the City of Los Angeles that is the Department of Building and Safety. For most system changeouts and for duct replacements over 25 feet, California's energy code also requires an independent field test by a certified rater (an ECC-Rater, formerly a HERS rater), which shows the ducts are sealed and, where the code calls for it, that the refrigerant charge is right.
If you are replacing a central system, ask about a heat pump. Los Angeles has a mild climate, and one unit both heats and cools. Two checks come first: whether the electrical panel has room for the new circuit, since a panel upgrade is a job of its own, and whether the existing ducts can carry the airflow a heat pump needs. Ductless mini-splits suit homes without ducts and additions. Rebate programs from the state and utilities change often; ask the contractor what is current and get it in writing.
Refrigerants are changing. Equipment built since 2025 uses R-454B or R-32 instead of R-410A, though R-410A systems built before then can still be sold from stock, and a failed outdoor unit on an existing R-410A system can still be replaced on its own. Ask which refrigerant a quoted system uses and what that means for parts and service later.
HVAC contractors hold the C-20 classification from the Contractors State License Board, and the law requires them to carry workers' compensation whether or not they have employees. Check the record at cslb.ca.gov for an active license, the bond and a workers' compensation policy rather than an exemption. Ask who will do the install, whether the company gets the permit, and whether the field test is included.
Maintenance is simple: change the filter on schedule, keep the outdoor unit clear, and have the system checked before the cooling season. A spring check finds weak capacitors, dirty coils and slow refrigerant leaks before a heat wave does.
Read the homeowner guide: what to do, who to call, and how to check the company