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angela46Jul 30, 2025
What to do if my Samsung Microwave Oven timer starts countdown but there is no microwave oscillation?
- IIsabel TerryJul 30, 2025
If the timer counts down, but there's no heat while the oven lamp and fan motor are running, here's what to check: * Adjust the door and latch switches, as they may be misaligned. * Inspect the high voltage components (H.V.Transformer, H.V. Capacitor, H.V.Diode, H.V.Fuse, Magnetron) following the component test procedure and replace any defective parts. Also, replace the PCB main. Possible causes include: * Off-alignment of latch switches. * Loose connection of the high voltage circuit, especially the magnetron filament circuit. Large contact resistance can lower magnetron filament voltage. * Defective high voltage components. * Loose wiring of the power relay. * Defective primary latch switch. * Defective power relay or Ass'y PCB.
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