Safety & CodesCâu 107 / 110
A furnace's high-limit (temperature limit) switch protects the equipment by doing what?
a.Metering gas continuously
b.Shutting off the burners if the furnace overheats
c.Increasing blower speed permanently
d.Recovering refrigerant
Giải thích
The high-limit switch senses excessive heat exchanger temperature, typically from low airflow, and shuts off the burners to prevent overheating and fire. Repeated tripping signals an airflow problem such as a dirty filter or failing blower. It is a key safety control that must never be bypassed.
Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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