F 250 2WD Super Duty V8-6.0L DSL Turbo VIN P (2004)
Ambient Temperature Sensor / Switch HVAC: Description and Operation
AMBIENT AIR TEMPERATURE SENSOR
The ambient air temperature sensor:
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is attached to left side of the grille opening panel to the left of the A/C condenser core.
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contains a thermistor which measures the temperature of outside air as a resistance and sends that reading to the EATC module.