Refrigerant Circuit, Blowing Through

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.

NOTE:

For vehicles in which no adapters fit on to the refrigerant pipes, for example a blower pistol with rubber mouthpiece is to be used to blow through individual components. Special care must be taken not to damage the connections (crushing or scratching).

Evaporator is to be blown out via the connection for low pressure line (large diameter) with the expansion valve or restrictor removed.

Always flush components in direction opposite of refrigerant flow direction.

Check the expansion valve and replace if dirty or corroded.

If there are dark, sticky deposits in the components that cannot be removed with compressed air, replace these components.

Thin, light grey deposits on the insides of refrigerant pipes do not impair the function of the components.

After flushing, always replace the receiver/dryer or reservoir and restrictor. Replace the dryer cartridge or dryer on condensers with attached dryer.