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Deanna MullinsSep 10, 2025
What to do if my Samsung Microwave Oven timer starts but there is no heat?
- IIan ScottSep 12, 2025
If the timer on your Samsung Microwave Oven starts counting down but there is no microwave oscillation (no heat, while the oven lamp and fan motor turn on), it could be due to several reasons: * Off-alignment of latch switches. * Open or loose connection of the high voltage circuit, especially the magnetron filament circuit. * Defective high voltage components such as the H.V. Transformer, H.V. Capacitor, H.V. Diode, H.V. Fuse, or Magnetron. * Open or loose wiring of the power relay. * Defective primary latch switch. * Defective power relay or Ass’y P.C.B. Adjust the door and latch switches. Check the high voltage components according to the component test procedure and replace them if defective. Consider replacing the P.C.B main.













