64 53... Notes on replacing drier bottle or drier insert

The drier bottle or drier insert does not have to be replaced at regular service intervals in a functioning, leakproof A/C system.

However, the drier bottle or drier insert must be replaced without fail in the event of: 

• the refrigerant being fouled by chips (e.g. when the compressor is clamped).
• a leaking A/C system or loss of refrigerant
• the refrigerant circuit being open for a period exceeding 24 hours, e.g. during a repair.