IntroductionRefrigerant Circuit
A/C System Repair Information
An A/C system made for refrigerant R12 must not be filled
with refrigerant R134a without making modifications to the
refrigerant circuit. Refer to
→ Chapter „Refrigerant Circuit, Converting R12 to R134a and
Ser ...
Indicator lamps
First read and observe the introductory information
and safety warnings
Indicator lamps in the instrument cluster
Lit up
Possible cause
Solution
Vehicle lighting not working partially or completely.
Change the corresponding bulb or
If al ...
Critical Point
Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance which boils easily, designated as refrigerant.
The refrigerant employed is tetrafluoroethane R134a, which
bo ...