Ice Maker not dumping ice RS22T5201SG

I have tried everything. Water fills the ice tray, but the ice will not dump into ice bucket. It stopped about 6 months ago and randomly came back on after a few days. It has now happened again and it has yet to start working again. If I push and hold the test button it will dump the ice. I have tried unplugging for 15 min , tried reset on control panel and nothing seems to work.