The Relay board is an OEM component specifically designed for GE microwaves. This board features electronic relays that control important functions such as power levels, timing, and safety features.  Symptoms of a bad relay board include: Microwave not heating or heating unevenly  Buttons or controls not working properly Timer not counting down accurately Safety features such as door interlock failing Buzzing, clicking, or popping noises coming from inside Causes of a bad relay board include component failure over time due to heat cycling, electrical surges or spikes, or physical damage from accidental drops or impacts.  This OEM GE part is also compatible with Hotpoint, RCA and some Kenmore models.WB27X32767 (AP6888696) replaces WB27X11114, 4958402, PS12722617.