The Tray Motor is an OEM part for GE microwaves. It is the component responsible for smoothly rotating the turntable tray during operation. A functioning tray motor ensures even heat distribution for consistent cooking results.  Causes of a bad tray motor can include wearing of internal bushings or bearings, defects in the windings, or damage from liquid intrusion over time. Symptoms of a bad tray motor include:  Turntable tray not spinning or rotating unevenly "Turntable On" indicator blinking or remaining constantly lit   Burnt or cold spots on cooked food items Loud grinding or clicking noises coming from inside This GE replacement part is also compatible with Hotpoint, RCA, and some Kenmore microwave models.WB26X10252 (AP4980362) replaces 1810602, AH3486610, EA3486610, MW-7600-21, PS3486610, WB26X30982.