HVAC Contractors in Vallejo, CA

HVAC contractors install, repair and maintain the heating, ventilation and air conditioning equipment that keeps your home comfortable. They work on furnaces, air conditioners, ductwork, thermostats and ventilation, and help size replacement systems.

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Common HVAC services include:

  • Furnace and air conditioner repair
  • Seasonal tune-ups and maintenance plans
  • Replacing furnaces, AC units and air handlers
  • Ductwork repair, sealing and installation
  • Thermostat and ventilation upgrades

Call an HVAC contractor when your system stops heating or cooling, runs constantly, makes new noises, or your energy bills jump. Heat pump installation and air duct cleaning also have their own categories.

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Top Professionals near Vallejo, CA

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Atlas Heating and Air Conditioning

Atlas Heating and Air Conditioning

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Oakland, CA HVAC Contractors

Atlas Heating and Air Conditioning is a longstanding family-operated business in California, established in 1908 and now in its fourth generation. The company is highly respected for its expertise in heating and air conditioning services, providing knowledgeable repair and maintenance with a focus on excellent customer service. Atlas Heating and Air Conditioning is committed to solving HVAC issues efficiently and professionally, earning strong customer trust and loyalty through personalized attention and reliable solutions. The company offers free estimates and prides itself on its experienced team and dedication to customer satisfaction.

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Harry Clark Heating and Air Conditioning

Harry Clark Heating and Air Conditioning

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Oakland, CA HVAC Contractors

Harry Clark Heating & Air Conditioning is a well-established HVAC service provider based in Oakland, CA, with a long history rooted in the local community. The company operates alongside Harry Clark Plumbing, both founded by Harry Clark and now managed by the Marshall family. Harry Clark Heating & Air Conditioning specializes in heating and air conditioning services, offering reliable and professional solutions to residential and commercial customers. The company prides itself on its tradition of quality service, experienced technicians, and commitment to customer satisfaction, continuing a legacy of trusted HVAC and plumbing services in the Oakland and Berkeley areas.

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Harry Clark Plumbing and Heating Inc

Harry Clark Plumbing and Heating Inc

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Oakland, CA HVAC Contractors

Harry Clark Plumbing is a long-established plumbing and HVAC service provider based in Oakland and Berkeley, CA, with a rich history dating back to the early 20th century. The company was founded by Harry Clark and has been passed down through generations, maintaining a strong tradition of local, reliable service. Today, the business operates as two separate companies run by two brothers, specializing in plumbing and sewer services as well as heating and air conditioning. Harry Clark Plumbing is known for its commitment to quality products and services, with a legacy of skilled craftsmanship and customer care that continues to evolve with the next generation of owners.

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San Francisco Expert Heating and Air

San Francisco Expert Heating and Air

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San Francisco, CA HVAC Contractors

San Francisco Expert HVAC is a local heating and air conditioning service provider offering installation, repair, and maintenance for residential and light commercial systems throughout the San Francisco area. The company works on furnaces, air conditioners, heat pumps, and ductless systems, and focuses on responsive service, dependable workmanship, and energy-efficient solutions to keep indoor environments comfortable year-round. With experienced technicians and a customer-first approach, the company provides timely diagnostics, transparent recommendations, and long-term performance optimization for HVAC equipment.

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Heating and Air Conditioning Questions and Answers

What does an HVAC contractor do?

An HVAC contractor installs, repairs and maintains heating and cooling systems, including furnaces, air conditioners, air handlers, ductwork and thermostats. They diagnose problems, perform seasonal maintenance and size replacement equipment for the home.

When should I repair or replace my heating or cooling system?

Repairs often make sense for a newer system with a single failed part. Replacement is worth discussing when equipment is older, needs frequent repairs, uses a phased-out refrigerant, or no longer keeps the home comfortable. Ask the contractor to compare both options in writing.

How do I choose an HVAC contractor?

Look for a contractor who performs a load calculation before recommending new equipment, explains options clearly and provides written estimates and warranty terms. Ask whether technicians who handle refrigerant hold EPA Section 608 certification and whether local licensing or permits apply.

What affects the cost of HVAC work?

Repair costs depend on the part and diagnostic time. Replacement depends on equipment type, capacity and efficiency, ductwork changes, electrical or gas work, and local permit requirements. Maintenance plans, rebates and the season you schedule in can also affect the total.

How should I prepare for an HVAC service visit?

Clear access to the furnace or air handler, the outdoor unit and the thermostat, and replace or check the air filter if you can. Note what the system is doing, such as noises, short cycling or uneven temperatures, and when the problem started.