Passat Syncro Wagon V6-2.8L (ATQ) (2000)
F129 has three functions:
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Switches the A/C clutch N25 off (via J293) when excessive refrigerant circuit pressure is present (e.g.: insufficient air flow over condenser or
when overcharged).
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Switches the A/C clutch N25 off (via J293) when insufficient refrigerant circuit pressure is present (e.g.: when refrigerant has leaked out)
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Switches on the second speed coolant fan V7 when refrigerant circuit pressure increases.
Note:
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The presence of F129 is engine dependant. Where F129 is not used, high pressure sensor G65 is used instead.
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Always confirm system use of either F129 or G65 and applicable wiring circuit using applicable "Engine" and "Air conditioning" wiring diagrams.
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A/C Pressure Switch F129 replaces the A/C Refrigerant High Pressure Switch F23, A/C Refrigerant Low Pressure Switch F73 and the A/C
Refrigerant High Pressure Switch F118.