Does it blow cold?
Is the cabin air filter clean?
If you have good airflow, does the behavior change (improve) with windows open and fan set to max?
edit:
Problem Symptoms Table
There is a section in the manual devoted to invoking a diagnostic mode and interpreting the results. Rapid engagement/disengagement of the compressor may indicate over-pressure on the high side. I've read about a failure of the cooler expansion valve causing this. Basic troubleshooting skill and tools will reveal the issue and I suggest verifying that before tearing apart the dashboard.