When troubleshooting an electric furnace, you find that the blower is operating, but cold air is coming out of the ducts, the thermostat is calling for heat, and the fan setting is on auto. What would be the most likely problem?

A. defective fan relay
B. defective thermostat
C. open heating elements
D. defective blower motor


Answer: C

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Fill in the blank(s) with correct word

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