SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam

On a typical combination fan-and-limit control for a gas warm-air furnace, which statement is correct?

The fan switch starts the blower as soon as the thermostat closes, before the heat exchanger warms The fan switch starts the blower after a temperature rise (or time delay) and stops it after a temperature drop, while the limit independently stops the burner on overtemperature The limit switch cycles the blower only and never affects the gas valve The control replaces the need for a listed gas valve

Correct Answer:

The fan switch starts the blower after a temperature rise (or time delay) and stops it after a temperature drop, while the limit independently stops the burner on overtemperature

Access more questions from this quiz

Continue to SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam for more practice questions and the full quiz experience.

Access More Questions