1998 Camry-green AC light blinking

Green AC light 1998 Camry
I turned the defroster on yesterday and it didnt work...just started fogging up windows worse...while this was going on the green AC light was blinking. Later the defrost worked fine and the green AC light did not blink ....Does anybody know what exaqctly the green light is indicating. I would assume it indicates the compressor is on and working..but dont understand why it blinked and did not work at that time I mentioned, and started workiong again with nothing being done. Thanks for any input.

There might have been a temporary obstruction in the evaporator which cleared, but caused an overpressure which went away with the obstruction. There are other similar potential causes. Check your sight glass and make sure you have enough refrigerant.