The limit switch is used on the electric element assembly to ____.
A. start the unit if the thermostat malfunctions
B. ensure that the fan stops when the unit cools down
C. start the unit prematurely on a cold day
D. open the circuit to the element if the furnace overheats
Answer: D
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Fill in the blank(s) with the appropriate word(s).
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Answer the following statement true (T) or false (F)
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