VW Polo manuals

Volkswagen Polo Service & Repair Manual: A/C Programmer -J127

This programmer switches the refrigerant flow direction through the second evaporator if the temperature on the cooling fins on the second evaporator lowers to the freezing point for water (icing protection).
 

A/C Programmer -J127

Electrical Components Not on Refrigerant Circuit
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Coolant Fan Control Module -J293
  Note There are different construction styles.     This control module switches on and off the A/C clutch ...

Other materials:

Increasing Temperature Due To Low Tire Pressure
The diagram shows the temperature behavior of a tire at speed of 180 km/h (111.84 mph). A -  Normal range: when maintaining the specified tire pressure, the temperature remains stable. B -  ...

A/C Service Station, Connecting for Measuring and Testing
  Caution If it is suspected that chemicals were added to the refrigerant circuit to seal leaks, do not connect the A/C service station and do not extract the refrigerant. ...

Reservoir
  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 manufactu ...

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