Replacement parts for gas furnaces can be found through online part retailers such as Repair Clinic, Reliable Parts or HVAC Parts Warehouse. Each website offers a wide selection of parts, such as gas valves and ignition switches, along with details on pricing and shipping.
The Repair Clinic website contains parts for several different kinds of residential and commercial appliance and heating systems. To view its selection of gas furnace parts, select the Heating and Cooling section from the main navigation bar, then choose Furnace from the available list of product types. All parts listed on the site contain pictures, with some parts also containing videos demonstrating the different components. Some information on installing the parts is also included, such as a rating system for the difficulty of completing repairs.
The HVAC Parts Warehouse site lists all gas furnace parts in one visual list, with the price and part name listed for each part as well as any available pictures. Parts can be sorted by manufacturer, category, price range and stocking availability. The quantity currently in stock for each part is listed below the product's name and part number. The site allows users to order parts through a phone service as well.