Toyota Repair: A/C clutch problems, magnetic clutch, clutch problems

Question
QUESTION: Ted, on 6/28/10 Jeff asked about the green button going off and on, causing the clutch to stop and go, which causes the air to be cool then hot. Your answer was either clutch, A/C Amplifier and drive belt. What and Where is th A/C Amplifier and where is it located? Is it possible the green button is faulty? Has anybody found a definite answer for this problem? I have changed the belt to no avail.

ANSWER: There are different a/c configurations for most toyota models so I would need the year and model of your vehicle.

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QUESTION: the car is a 2000 toyota sienna with the 3000 V6 engine

Answer
The most common reason for the light to flash is that the freon pressure is too low, if that is not the case and you are sure the freon pressures are good then I would recommend trying a new a/c magnetic clutch relay located under the hood in the fuse/relay block.