With the dial turned down, the element is on for a few seconds until the bi-metal switches it off. ![]() Īs the control button is turned clockwise, it rotates a cam that applies an increasing amount of pressure, pushing the contacts together so when it reaches the max setting, the bi-metal cannot counteract it, causing the direct heat to remain turned on at maximum wattage until it's turned down. This causes the bi-metal (right contactor in Figure 4) to flex out and break contact. How the Controller Worksįigure 3 shows the inside of the simmerstat with two sets of contactors that make contact as the dial is turned clockwise, letting the current go through a bi-metal strip that generates a small amount of heat. The time it stays on depends on the setting of the control knob. This constitutes a complete cycle, and it keeps repeating itself. Instead of controlling from the ambient heat in the oven, it controls it with an "infinite switch" (AKA ""simmerstat") that determines how long the heat is applied to the heater coil before switching it off until it cools down and switches back on. The cooktop part of the stove applies direct heat to food.
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