Has this ever happened with your home’s electric furnace? You switch it on one day—maybe the first cold day of the fall season, or maybe deep into the winter—and instead of starting to heat up, it immediately stops working entirely because it flips a circuit breaker.
You’re not alone. An electric furnace requires a large amount of electricity to run, and all this demand on the circuit can cause an overload, which the breaker trips in order to protect the electrical system.
But if the electric furnace needs that much power to operate, why doesn’t it always trip the breaker in the electrical panel when it turns on? There’s a reason, and it’s in a component that is one of the most vital for operating an electric furnace reliably: the sequencer.