Refrigerant Circuit, Cleaning

WARNING: This page is about a different car, the 2024 Audi S6 and 2024 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Clean the refrigerant circuit with refrigerant R134a (flush with refrigerant R134a) (Refer to REFRIGERANT CIRCUIT, CLEANING (FLUSHING) WITH REFRIGERANT R134A ) or blow out with compressed air and nitrogen (Refer to REFRIGERANT CIRCUIT, CLEANING WITH COMPRESSED AIR AND NITROGEN ) if:

-- Moisture or dirt has gotten into the refrigerant circuit (after a collision for example).

-- Refrigerant oil is dark and viscous.

-- There is too much refrigerant oil in the refrigerant circuit after replacing the compressor.

-- The A/C compressor had to be replaced due to "internal" damage (for example, noises or no output).

NOTE:

When cleaning components with compressed air and nitrogen, always extract the gas mixture escaping from the components through a suitable exhaust extracting system (workshop extraction system).