For over 20 years, Mark's Heating & Air has provided reliable HVAC services to El Cajon and San Diego County. Our certified technicians offer comprehensive heating and air conditioning repair, maintenance, and installation. We service all brands and provide 24/7 emergency repairs to ensure your home's comfort. Our services include AC tune-ups, furnace repair and replacement, duct cleaning, and indoor air quality solutions like air purifiers and humidifiers. We also offer HVAC service agreements for preventative maintenance. Trust our local team at 1284 El Rey Ave for honest, upfront pricing and quality workmanship on every job.

For El Cajon residents and businesses, Liberty Mechanical, Inc. is your trusted local HVAC expert. Located at 1943 Friendship Dr STE E, we provide comprehensive heating and air conditioning services to keep your home comfortable year-round. Our certified technicians specialize in professional HVAC installation, prompt repair, and thorough maintenance services. We handle everything from air conditioner tune-ups and furnace repairs to complete system replacements and indoor air quality solutions. For reliable, efficient, and honest service from a team that cares, contact Liberty Mechanical, Inc. for all your climate control needs.

Blue Diamond Heating & Air provides expert HVAC services from its El Cajon location at 405 Vernon Way. The company specializes in comprehensive heating and cooling solutions, including precision air conditioning installation, repair, and maintenance. Their certified technicians also offer expert heating system services for furnaces and heat pumps. They perform detailed HVAC inspections, duct cleaning, and indoor air quality assessments to improve home comfort. For immediate needs, they provide 24/7 emergency repair services. Blue Diamond handles system replacements, smart thermostat installations, and offers financing options to ensure your El Cajon home remains at the perfect temperature year-round.