Why is it important to cycle the furnace on and off several times when replacing a sequencer?
A) To make sure the power is working correctly.
B) To make sure that only the heating elements are coming on and not the blower.
C) To make sure the heating elements and the blower are turning on at the same time.
D) To make sure the heating elements and the blower are switching on and off in the correct cycle.
D
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