A/C system, general repair guidelines: Notes

The refrigerant circuit of the A/C system must not be discharged and opened unless this is necessary because of safety precautions or unless components of the refrigerant circuit of the A/C system have to be to replaced. See A/C REFRIGERANT SYSTEM \(R-134A\), DISCHARGING .

When performing all other usual vehicle repair work, the refrigerant circuit of the A/C system should also remain closed.

Servicing operations that can be carried out on the heating and air conditioning system without opening the refrigerant circuit, are described in REFRIGERANT CIRCUIT, SERVICING .

NOTE: The connections for switches mentioned in this Repair Manual are provided with a valve that closes automatically when the switches/sensors are unscrewed and removed. These switches can be replaced even though the refrigerant circuit is fully charged.

For servicing operations to A/C systems that require discharging the refrigerant circuits. See A/C REFRIGERANT SYSTEM (R-134A), DISCHARGING .

Service work on A/C systems that pertains to the refrigerant circuit should only be carried in workshops equipped with suitable workshop tools.