Gas Heat ESCO Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

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Question: 1 / 400

A gas furnace has an electronic control board. How is the fan cycled during heating?

based on a pressure switch

time

The fan is typically cycled by a time function. This is because the fan needs time to blow warm air through the ducts and into the living space. Options A, C, and D are all incorrect because they do not accurately describe how the fan is cycled during heating. A pressure switch is used to monitor air pressure, temperature typically controls the thermostat, and voltage measures the electrical potential difference.

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temperature

voltage

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