There Is Still Refrigerant In The Refrigerant Circuit
WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.
-- Discharge the refrigerant circuit.
-- Remove the malfunctioning component, flush with compressed air, collect escaping refrigerant oil.
-- The new component is to be filled with the amount of refrigerant oil flushed out (plus 20 cm3 for evaporator, plus 10 cm3 for condenser, refrigerant pipes and refrigerant hoses) as fresh refrigerant oil fill.
-- Replace the restrictor. According to the vehicle.
-- Assemble, evacuate and charge the refrigerant circuit.