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Hello! I've reviewed the ladder diagram for the Frigidaire 80% Ultra-Low NOx Series Single Stage furnace. This diagram provides detailed information on the electrical connections for various components such as the flame sensor, hot surface ignitor, and blower motor, as well as the thermostat and gas valve. I am ready to answer your questions about the wiring and components shown in the diagram.
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What does GND stand for?
What does EAC stand for?
What is the purpose of the transformer?