Volkswagen Polo Quiz
Refrrigerant R134a Servicing

Expansion Valve

In this manual: Refrrigerant R134a Servicing
General Paint Information — 128Towing Guide — 10Whels, Tires, Whel Alignment — 126Battery, Starter, Generator, Cruise Control — 65Windshield Wiper/ Washer System — 9Exterior Lights, Switches — 1Interior Lights, Switches — 7Wiring — 51Refrrigerant R134a Servicing — 134
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Caution Non-approved tools or materials such as leak sealing additives can cause damage or malfunctions in the system.

Only use tools and materials approved by the manufacturer.

The warranty is voided if non-approved tools or materials are used.
All components of the refrigerant circuit submitted for quality observation are always to be sealed (use original sealing caps of original part). Replace damaged or leaking components of refrigerant circuit. Refer to → Chapter „Components, Replacing“. To date, the original parts (compressor, reservoir, receiver/dryer, evaporator and condenser) have been filled with nitrogen gas. This charge is being gradually discontinued. There is little or no pressure equalization when removing the sealing plugs from the original part.
The expansion valve atomizes the streaming refrigerant and controls the flow quantity so that the vapor is gaseous only at the evaporator outlet, depending on the heat transmission.
Expansion Valve

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