Air conditioning system refuels coolant R-12 freon, and details of system are under the working pressure over 30 000 kPa. Sources of the increased danger at improper maintenance of system by unprepared technicians and use of the inadequate equipment are the high pressure and chemical influence of coolant.

Automobile coolant R-12 Freon possesses dangerous impact on the environment. For environment protection Volkswagen orders to use at depressurization of air conditioning system the equipment on utilization and processing supplied with the certificate of Insurance Laboratory (UL), for example, of the Kent-Moore ACR3 brand or equivalent to it.

PREVENTIONS 1. Air conditioning system has to be served by exclusively prepared technicians trained in safe working methods, with use of the appropriate equipment, with observance of rules of depressurization, acquainted with methods of collecting and order of storage of automobile coolant. 2. Do not allow contact of coolant with skin. 3. During the work near air conditioning system put on goggles. 4. At hit of coolant on skin or eyes do not pound the struck place. Immediately wash out cold water within not less than 15 min. Immediately see a doctor or in medical institution. Self-treatment is not allowed. 5. Coolant is in a new cylinder under pressure. It is necessary to store a cylinder at a temperature not above 50 °C. Take the measures excluding falling of a cylinder about heights or its damage. 6. Works should be carried out in well ventilated room. Coolant quickly evaporates and can lead to reduction of access of oxygen and the complicated breath. 7. Gaseous coolant is heavier than air and rather quickly has to gather below, for example, under the car. 8. At combustion of coolant poisonous gas is formed. You store coolant far from open sources of fire. 9. When carrying out welding works near air conditioning system always delete from it coolant. Electric welding near pipelines with coolant can cause decomposition of coolant under the influence of ultra-violet radiation. 10. Do not subject air conditioning system detail to influence of high temperature or an open flame. The overheat can lead to increase in pressure in system and to ignition. 11. Cleaning of the condenser or evaporator by means of water vapor is not allowed, it is necessary to use only cold water or compressed air.