Thompson Supply Company, a trusted name since 1935, specializes in providing top-quality HVAC-R parts, equipment, and supplies to residential, commercial, and industrial clients in Missouri and Illinois. As a third-generation family-owned business, we pride ourselves on sourcing even the hardest-to-find parts, including gas valves, thermostats, furnace control boards, motors, igniters, and more. Our extensive inventory offers both OEM and aftermarket options to meet diverse needs. While we welcome the public, please note that electrical, gas control, and special order parts are non-returnable. Dedicated to exceptional customer service, we ensure timely and cost-effective solutions for your HVAC-R needs. Though we are a parts sales-only business, we remain committed to being your go-to resource for quality and expertise in the industry.