audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Low Pressure Sensor / Switch, HVAC > < Compressor Speed Sensor, HVAC|Description and Operation|Page 383
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High Pressure Sensor / Switch: Service and Repair

Switch Identification:  Red housing with bonded wire connections.

Function:  

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Switches A/C clutch off if system pressure is too high.

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Switch opens (compressor off): 28.2 - 31.0 bar (409 - 450 psi

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Switch closes (compressor on): 10.3 - 17.2 bar (149 - 250 psi

Removing And Installing:

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Remove electrical connector and unscrew high pressure switch -F118-.

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Refrigerant system remains closed (Schrader valve under switch)

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Install new O-ring -A.- (7.6 mm x 1.8 mm), lubricate with refrigerant (PAG) oil and make sure it is properly seated in groove.

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Install switch.

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Tightening torque: 5 Nm (44 in. lb)

Low Pressure Sensor / Switch, HVAC > < Compressor Speed Sensor, HVAC|Description and Operation|Page 383