Expedition 2WD V8-5.4L (2009)
Expansion Block/Orifice Tube: Description and Operation
A/C Pressure Transducer
Air Conditioning
A/C Pressure Transducer
The A/C pressure transducer communicates the compressor discharge pressure to the PCM. The PCM will interrupt A/C compressor operation in the
event that the A/C pressure transducer indicates excessively high system discharge pressures. It is also used to sense low charge conditions. If the
pressure is below a predetermined value for a given ambient temperature, the PCM will not allow the clutch to engage.
