Action Air Conditioning, Heating & Solar is a 5-star rated San Marcos-based HVAC contractor serving San Diego County since 1975. Our HVAC services cater to both residential and commercial HVAC needs and include air conditioning and heating installation, repair, service and maintenance, as well as air duct cleaning, air filtration systems and green HVAC for businesses. Our technicians are NATE-certified and factory-trained. They will always be professional, punctual and respectful, treating your property as they would their own. We also have zero-downpayment financing, emergency services and Satisfaction Guarantee. We have served thousands of San Diego home and business owners, read the reviews on our site and online. Visit our website to schedule a free on-site estimate, request a service or inquire. And always feel free to call us!