E 150 V8-5.4L (2008)
Blower Motor Resistor: Description and Operation
BLOWER MOTOR RESISTOR
The blower motor resistor has the following features:
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The assembly is located on the passenger side of the vehicle on the evaporator housing.
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Three resistance elements are mounted on the resistor board to provide 4 blower motor speeds.
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Depending on the blower switch position, series resistance is added or bypassed in the blower motor circuit to decrease or increase blower motor
speed.
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An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F) interrupting the
blower motor operation in all speeds except HI.
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The thermal limiter cannot be reset and is not serviceable.
