Slide the icemaker out, remove the cover. With a voltmeter leads in pins N and L, you should measure 115 volts, if not, you have bad optics, or lack of voltage to it. Put a wire jumper between pins T and H. Icemaker should advance to the 11 o'clock position,and fill the icemaker with water. If no water and water valve hum, you have a frozen water line. If no water valve hum, you have a bad icemaker.