Business Details
50+ Years
experience
Trusted HVAC Parts Supplier in St. Louis Since 1935
Thompson Supply has been a trusted provider of HVAC-R parts and equipment in the St. Louis region since 1935. As a third-generation family-owned business, we specialize in sourcing hard-to-find components for residential, commercial, and industrial systems. Our extensive inventory includes OEM and aftermarket parts such as gas valves, thermostats, furnace control boards, and refrigeration components, supported by industry expertise that ensures timely, cost-effective solutions. We serve both professionals and DIY customers, maintaining a commitment to quality and customer satisfaction. Our team's deep knowledge of HVAC systems enables us to assist clients in selecting the right parts for their specific needs.While we focus exclusively on parts sales, our technical support helps customers implement effective repairs and maintenance. With decades of experience and a reputation for reliability, we remain dedicated to meeting the evolving demands of our local market. Our operating hours accommodate both weekday and Saturday morning visits, ensuring accessibility for urgent requirements. We maintain partnerships with leading manufacturers to offer trusted brands and specialized products. Through consistent service and community focus, we continue to support the HVAC industry's critical infrastructure needs.
Services
HVAC Parts Supply
OEM Components
Aftermarket Parts
MRO Supplies
Refrigeration Components
Furnace Control Boards
Thermostats
Gas Valves
Test Instruments
Hard-to-Find Parts
Details
- Year established: 1935
Highlights and features
- We offer 88 years of specialized HVAC parts expertise since 1935
- Our extensive inventory includes both OEM and aftermarket components
- Family-owned business with deep local market knowledge
- Technical staff provides expert product selection assistance
- Saturday morning availability for urgent repair needs
What people say
Very knowledgeable
Had the part in stock
Excellent customer service
Stop by and see David
Heaven-sent man
Services
HVAC Parts Supply
We provide comprehensive HVAC system components including gas valves, thermostats, and furnace control boards. Our inventory supports residential, commercial, and industrial applications with both standard and specialized parts. Technical expertise ensures proper component matching for system compatibility and performance optimization.
OEM Components
We supply factory-original HVAC parts from leading manufacturers, ensuring precise specifications and warranty compliance. Our OEM inventory covers major brands like Carrier, Lennox, and Trane. This guarantees authentic replacements that maintain system integrity and performance standards.
Aftermarket Parts
We offer cost-effective aftermarket alternatives for HVAC systems without compromising quality. Our selection includes motors, igniters, and flame sensors that meet industry specifications. These parts provide reliable performance while reducing maintenance expenses for our customers.
MRO Supplies
We stock maintenance, repair, and operations supplies essential for HVAC system upkeep. Our inventory includes cleaning chemicals, lubricants, and diagnostic tools. These products support preventive maintenance programs and emergency repair operations across various facility types.
Hard-to-Find Parts
We specialize in sourcing uncommon HVAC components that other suppliers cannot locate. Our industry connections and extensive network help recover obsolete or discontinued parts. This capability minimizes equipment downtime for critical heating and cooling systems.
Questions
What types of HVAC parts do you carry?
We stock OEM and aftermarket components including gas valves, thermostats, furnace control boards, motors, igniters, and refrigeration parts for residential, commercial, and industrial systems.
Do you sell to both businesses and homeowners?
Yes, we serve HVAC professionals, industrial clients, and DIY homeowners with equal attention to product knowledge and service requirements.
Can you help locate obsolete HVAC components?
Our specialty is sourcing hard-to-find parts through industry connections and extensive inventory that other suppliers cannot provide.
What are your business hours?
We're open Monday-Friday 8:30 AM - 4:00 PM and Saturday mornings until 11:00 AM for urgent repair needs.
Do you offer return privileges?
Most items have standard return policies, though electrical components, gas controls, and special orders are non-returnable as specified in our terms.
Are your staff trained in HVAC technical support?
Our team provides expert product recommendations based on decades of industry experience and technical training specific to HVAC systems.
