Learn all about your furnace pilot light — where it is, what it does, and how to troubleshoot the most common issue.

Read more: 20 Genius Tips For Using WD-40 At Home The thermocouple's job is to prevent gas from leaking. If the pilot light goes out, it is designed to turn off the flow of gas by closing the gas ...

when the wind blows a pilot light out, a cloud of unignited gas can accumulate. The sensor allows the pilot light to be automatically re-ignited if the flame is no longer present. The circuit is a ...