Swan Intermittent Power or Overheat Protection Activation

Microwave runs but stops partway through the set time and returns to clock display.

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 magnetron or transformer, Failing door switch losing contact, Faulty control PCB, Poor ventilation causing thermal cut-out trip

Safety: Unplug before internal checks.

Step 1 – Check ventilation: Ensure vents are clear and the microwave has proper clearance.
Step 2 – Test with different loads: Try shorter cycles and lower power. If it only stops on long/high-power runs, overheating is likely.
Step 3 – Inspect door switches: A loose or worn door switch can momentarily open, stopping the cycle. Test and replace as needed.

Persistent mid-cycle stopping often requires professional diagnosis of thermal cut-outs and control PCB.

Hard 4/5

Door Interlock Switch Set

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