Your appliance needs to heat up before steaming. Allow it to heat up for 30 to 60 seconds (refer to the User Manual for the exact heat-up time of your model) before using it.
When heating up, the steam-ready blue or white light will be blinking as its default mode, and once heated up and ready for use, it will stop blinking.
The following applies to models GC62x and AIS85xx:
During start-up: If the power button is flashing, wait for 90 seconds for the steamer to heat up. You can then press the steam trigger.
During steaming: If the power button is flashing, the steamer has switched to the auto shut-off mode. Press the power button to get the steamer to heat up again. Once it has heated up, press the steam trigger.