What to do if my Samsung MC1015BB timer starts but there's no heat?
- GgarciathomasAug 20, 2025
If your Samsung Microwave Oven timer starts counting down but there is no microwave oscillation (no heat, while the oven lamp and fan motor turn on), the issue might be due to: 1. Off-alignment of latch switches. 2. Open or loose connection of the high voltage circuit, especially the magnetron filament circuit. 3. Defective high voltage components, such as the H.V. Transformer, H.V. Capacitor, H.V. Diode, H.V. Fuse, or Magnetron. 4. Open or loose wiring of the power relay. 5. Defective primary latch switch. 6. Defective power relay or Ass’y PCB. Adjust the door and latch switches. Check the high voltage components according to the component test procedure and replace if defective. Consider replacing the PCB main.