| l
| Ensure absolute cleanliness when working. |
| l
| Wear safety goggles and gloves when working with refrigerant and nitrogen. |
| l
| Switch on workshop extraction systems, if available. |
| l
| Always use air conditioner service station to discharge refrigerant circuit, then unfasten screw connections and renew defective components. |
| l
| Use caps to seal off opened assemblies and hoses to prevent the ingress of moisture and dirt. |
| l
| Use only tools and materials intended for refrigerant R134a. |
| l
| Seal opened refrigerant oil containers to protect against moisture. |
Note | t
| After completing service work, screw sealing caps (with seals) onto all connections with valves and service connections. |
| t
| Before starting up air conditioning system, check specified capacity for vehicle → Chapter. |
| t
| Do not top up refrigerant in circuit; discharge existing refrigerant and re-charge system. |
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