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The Lennox 21W14 Ignition Control Board is a crucial component in various Lennox heating and cooling systems, including furnaces, boilers, and air conditioners. This circuit board plays a vital role in ensuring safe and efficient operation by regulating the ignition process.When the system calls for heat or cool air, the 21W14 receives a signal and triggers a series of actions. It controls the flow of electricity to the igniter, creating a spark that ignites the gas or fuel in your furnace or boiler. Simultaneously, it monitors flame presence and safety sensors, ensuring proper combustion and
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