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When does the furnace blower turn OFF in normal operation?

April 26, 2017blower furnace normal operation turn

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When does the furnace blower turn OFF in normal operation?

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When the thermostat has been satisfied and turns off the oil or gas burner at the furnace, the fan limit switch will cause the blower or fan unit to continue to operate until the temperature at the supply plenum has reached or dropped below the “cut-in” or “fan-on” lower limit on the switch.