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 A flame sensor is a device used in heating systems to detect the presence of a flame. It is a crucial component in gas appliances, such as furnaces, boilers, and water heaters, 

 A furnace igniter is a component in a gas furnace that is responsible for initiating the combustion process by igniting the gas.

 A furnace limit switch is a crucial safety device in a heating system, typically found in forced-air heating systems like furnaces. Its primary function is to monitor the temperature inside the furnace

 The furnace inducer assembly Is a critical component in a modern gas furnace. Its primary function is to assist in the proper combustion and venting of gases produced during the heating process.

 The furnace blower motor is a crucial component in a forced-air heating system. Its main function is to circulate air throughout the HVAC (Heating, Ventilation, and Air Conditioning) system, allowing for efficient heat distribution. 

 Relays in a furnace play a crucial role in controlling various electrical components and ensuring the proper operation of the heating system. Relays are switches that are operated by electrical signals, and they are used to manage the flow of electricity to different parts of the furnace.

 Furnace pressure switches are safety devices used in heating systems to ensure proper venting and combustion. These switches play a crucial role in preventing the release of harmful gases, such as carbon monoxide, into the living space.

 Furnace filters are an essential component of a forced-air heating system. They play a crucial role in maintaining indoor air quality, protecting the HVAC system, and ensuring efficient operation 

 A furnace control board, also known as a circuit board or control module, is a crucial component in a modern heating system. It serves as the "brain" of the furnace, coordinating and controlling various functions to ensure efficient and safe operation. heating furnace parts furnace parts supplier