SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam

On a two-stage gas furnace thermostat, W2 typically does which of the following?

Energizes the reversing valve Calls for second-stage (high-fire) heat after W1 has already called for first-stage heat Opens the outdoor disconnect Closes the main gas cock at the meter

Correct Answer:

Calls for second-stage (high-fire) heat after W1 has already called for first-stage heat

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