A potentiometer is a three-terminal resistor with a sliding or rotating contact (wiper) that forms an adjustable voltage divider. If only two terminals are used, it acts as a variable resistor or rheostat. More »

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A volume control switch or potentiometer generally comes in three different types: rotary, linear and digital. A rotary potentiometer, also known as a thumb pot, has a wiper that moves along a circular path and can be ro... More »

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Some common electrical symbols are a line, which denotes an electrical wire, two lines perpendicular to each other with a dot at the intersection, which signifies two connected wires, and two perpendicular lines without ... More »

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A potentiometer is a three-terminal variable resistor, while a rheostat is a two-terminal variable resistor. Electricians usually use rheostats to adjust current and potentiometers to adjust voltage. Potentiometers work ... More »

Some common problems that occur with a blower motor resistor include corrosion on the resistor and an increased electrical current to the resistor. Both of these problems results in the failure of the resistor. More »

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The resistor can be found underneath the dashboard at the heater compartment of a blower motor. The resistor allows the blower motor to change the fan speed. More »

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To test a resistor using a multimeter, turn off and unplug the appliance that is using the resistor. Determine the strength and tolerance of the resister, and set the multimeter to an appropriate scale. Connect both prob... More »

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