Princess Intermittent Power Loss or Safety Trip

Microwave runs for a few seconds and then stops, clearing the time or returning to the clock without heating fully.

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.

Possible Causes

Overheating internal thermal cut-out, Loose mains connection inside unit, Failing main control board relay, Faulty door interlock switch opening under vibration

How to Fix / Troubleshooting

Safety: Unplug before inspection.

Check door fit: Ensure the door closes firmly and does not wobble. A loose door can cause switches to open mid-cycle.
Ventilation: Make sure vents are not blocked and the unit is not overheating.
Test with light load: Try heating a cup of water. If it still stops early, internal components may be failing.
Service: A technician should inspect door switches, thermal cut-outs, and the main PCB for intermittent faults.

Repair Difficulty

Hard 4/5

Required Part

Door Interlock Switch Set

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