What to do if the Samsung MR1031UWC timer starts but there is no heat?
- EejohnstonNov 22, 2025
If your Samsung Microwave Oven timer starts counting down, but there's no microwave oscillation (no heat, but the oven lamp and fan motor are working), here are a few things to check: 1. Make sure the latch switches are correctly aligned, and adjust them if needed. 2. Inspect the high voltage circuit, especially the magnetron filament circuit, for any loose connections. High contact resistance can lower the magnetron filament voltage, causing reduced output or intermittent oscillation. 3. Test the high voltage components (H.V. Transformer, H.V. Capacitor, H.V. Diode, and Magnetron) and replace any defective components. 4. Check the wiring of the power relay for any looseness or breaks. 5. Inspect the primary and secondary latch switches for defects. 6. A defective power relay or Ass...









