Aviator AWD V8-4.6L DOHC VIN H (2003)
Control Module HVAC: Description and Operation
Blower Motor Speed Control
The blower speed control:
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is located on the heater core and evaporator core housing near the blower motor.
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converts low power signals from the DATC module to a high current, variable ground feed for the blower motor.
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varies the blower motor speed and is controlled by the DATC module software.
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has a delay function to provide a gradual increase or decrease in power motor speed under all conditions.
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controls the integral high blower speed relay which is engaged when maximum fan speed is selected.
