Mahesh for Model Number JNM1541DM4BB, GE counter top Microwave The schematic and the wiring drawing (found rolled behind the control panel) and actual information on control PCB do not match. The relay reference numbers, screen printed operating function do not match. On the boards and wiring to the control board. The microwave had stopped working, no display, after smoke from counter top. The three TCO, as per circuit diagram, Bottom TCO, Hood TCo and Cavity TCO replace, all TCO are in "closed" condition. All the functions of microwave are ok, except the vent fan is always running at "slow" speed. The vent fan speed changes to "High" and "Low", but never "OFF". Thank you in advance. Mahesh
Answer Mahesh, With the vent fan never shutting off then the issue will be caused by a faulty control board relay which the control board would need replaced. The part number for the control board is WB27X10931. Read More... Answered by AppliancePartsPros.com | Tuesday, July 14, 2015