A/C Service Station, Emptying
Searching for Refrigerant Circuit Leaks with Compressed Air or NitrogenVolkswagen Touran Service Manual. Electrical Components Not on Refrigerant Circuit
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).
...
Volkswagen Touran Service Manual. 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.
...