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Your electric furnace is not going to be able to do you much good without your contactor. You will need this in order to keep the temperature in your home nice and comfortable during the winter season. Sequencer. A sequencer used on an electric furnace is something that will turn your heating elements either on or off. It can do this to more than one should this be necessary. A sequencer is needed because it helps to keep the current spike that is electric down. This is something that can happen whenever your electrical device becomes energized in any way. It does not take much for your electrical device to become energized.
Electric Furnace Operation. The heating element is only one small part of an electric home heating system. Heating starts with the thermostat, which sends an electric signal to relays inside the furnace. Those relays apply voltage to the heating elements, causing them to build up heat. Next, forced-air blowers are automatically started to move hot air through the cabinet to eventually heat the living areas of the house.