A/C Pressure Switch F129

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Fig 1: A/C Pressure Switch F129

Courtesy of VOLKSWAGEN UNITED STATES, INC.

This pressure switch has 3 functions:

1. Switches coolant fan up to next speed setting in the event of pressure increase (approx. 16 bar) in refrigerant circuit.

2. Switches off air conditioner in the event of excessive pressure (approx. 32 bar) caused for example by inadequate engine cooling.

3. Switches off air conditioner in the event of insufficient pressure (approx. 2 bar) caused for example by loss of refrigerant.

NOTE:

The A/C Pressure Switch F129 replaces the A/C Refrigerant High Pressure Switch F23 , the A/C Refrigerant Low Pressure Switch F73 and the A/C Refrigerant High Pressure Switch F118.