A/C Pressure Transducer

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

The A/C pressure transducer monitors the compressor discharge pressure and communicates with the PCM. The PCM will interrupt A/C compressor operation in the event that the A/C pressure transducer indicates 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.

Peanut Fitting

Fig 1: Identifying A/C Pressure Transducer Components

Courtesy of FORD MOTOR CO.

When disconnecting or connecting peanut fittings, observe the following:

The male and female blocks of the peanut fitting are retained with a nut.
Support the female fitting with a wrench to prevent twisting of the tubes.
An O-ring seal is installed around the tube on the male block.
When correctly assembled, the male and female fittings should be flush.
Use only the O-ring seal listed in the Ford Master Parts Catalog.