Diagnostic Heating & Cooling is an HVAC company based in St Louis, MO, offering repair and installation services for air conditioners, furnaces, heat pumps, and boilers. The company provides comprehensive HVAC solutions, including system upgrades and tailored repairs. With over 70 years of combined experience, Diagnostic Heating & Cooling employs skilled technicians who use certified products and adhere to local and regional standards.

Dixon Heating Cooling is a family-owned HVAC company serving St Louis, MO, and the surrounding metro-east area since 1979. They provide repair, installation, and maintenance services for air conditioning and furnace systems, handling all makes and models. With over 35 years of experience, Dixon Heating Cooling offers a Presidential Maintenance Program to help maintain HVAC systems year-round and reduce repair costs.