Operation CHARM: Car repair manuals for everyone.

Technician Safety Information

Air conditioning system contains R-134a. This is a chemical mixture which requires special handling procedures to avoid personal injury.

Always wear goggles and wrap a clean cloth around fittings, valves, and connections when performing work that involves opening the refrigerant system. Always work in a well ventilated area and do not weld or steam clean on or near any vehicle-installed air conditioning lines or components.

If R-134a should come in contact with any part of the body, flush the exposed area with cold water and immediately seek medical help.

All R-134a drums are shipped with a heavy metal screw cap. The purpose of the cap is to protect the valve and safety plug from damage. It is good practice to replace the cap after each use of the drum for this same reason.

If it is necessary to transport or carry any container of R-134a in a vehicle, do not carry it in the passenger compartment.

The refrigerant system may be evacuated and charged using an air conditioning service charging station or a manifold and gauge set and a drum of R-134a (13.6 kg [30 lbs.]).

Before removing and replacing any of the air conditioning refrigeration lines or components, the R-134a must be completely removed from the system using an approved refrigerant recovery system.

Always use service valve and charging station equipment or pressure gauge sets during evacuation and charging procedures.

CAUTION: DO NOT CONNECT ANY LINE TO THE HIGH-SIDE SERVICE FITTING DURING CHARGING PROCEDURE.