Hisense Intermittent Power Loss or Overheat Protection

Microwave stops partway through cooking and resets or loses time settings.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose power plug or outlet,Overheating transformer or magnetron triggering thermal cut-out,Defective main control PCB,Faulty internal wiring connection

How to Fix / Troubleshooting

Safety first: If you smell burning or feel excessive heat on the cabinet, unplug the microwave and do not reuse until inspected.

Steps:

  • Check power connection: Ensure the plug fits tightly in the outlet. Try another outlet if possible.
  • Ventilation: Confirm that vents are not blocked and that there is adequate clearance around the microwave.
  • Test with shorter cycles: Run several short (30–60 second) cycles with a cup of water. If the unit resets randomly, an internal fault is likely.

Service:

  • A technician should inspect the thermal cut-outs, magnetron, and control board for overheating or intermittent connections.
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Repair Difficulty

Hard 4/5

Required Part

Thermal Cut-Out (TCO)
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