Chevrolet Cobalt Service & Repair Manual: Refrigerant Recovery

The refrigerant system must be discharged using an air conditioning refrigerant recovery and recycling system. After completing any required repairs the refrigerant system can be evacuated and charged using an air conditioning service charging station. Service fitting caps are color coded for easy reference. Red cap indicates high side port. Blue cap indicates low side port.
Failure to inspect for residual oil from previous recovery can result in adding extra oil to the current vehicle being serviced. This will result in reduced performance and possible compressor damage.
1. Start vehicle and run with A/C On for two minutes, then attach manifold gauge set to A/C system. Attach recovery station inlet hose to center fitting of manifold gauge set.
2. Open both valves of manifold gauge set. Ensure refrigerant tank vapor valve and liquid valve are open.
3. Turn main power switch On.
4. Depress compressor start switch. Amber Compressor On light will come on and compressor will start. Compressor will shutoff automatically when recovery is complete.
5. Wait two minutes and inspect for pressure rise. If pressure rise occurs, depress compressor start switch to repeat recovery procedure.
6. To drain receiver dehydrator of A/C system oil, open receiver dehydrator pressurizing valve for 15 seconds to allow compressor discharge pressure back into receiver dehydrator.
7. Open oil drain valve slowly and drain receiver dehydrator. When oil stops draining, close oil drain valve.
8. Do not allow receiver dehydrator to completely depressurize.
    Precautions
    Battery Ground Cable Prior to service, disconnect battery ground cable and isolate as required. Radio Coded Theft Protection System The "Theftlock" theft deterrent ...

    System Inspection
    The individual components of the refrigerant system will often give clear signs of their malfunctioning. Use the following general descriptions to pinpoint faulty components. ...

    See also:

    Chevrolet Cobalt Owners Manual. Finish Care
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    Chevrolet Cobalt Owners Manual

    Chevrolet Cobalt Service Manual


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