> In a gas heater, a small flame that’s always on can quickly ignite the entire furnace to heat up a house Sure, I’m being nitpicky, but that’s a terrible expl

> In a gas heater, a small flame that’s always on can quickly ignite the entire furnace to heat up a house Sure, I’m being nitpicky, but that’s a terrible explanation of the purpose of a pilot light in a legacy furnace.