Swan Start Circuit / Safety Interlock Not Engaging

Swan coffee maker powers on but will not start brewing when the start button is pressed.

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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

Brew basket not seated, Lid micro-switch open, Carafe not detected, Faulty start button or keypad

How to Fix / Troubleshooting

Safety first: Unplug the unit before manipulating mechanical parts around the brew head.

User checks:

  • Verify assembly: Ensure the filter basket, lid, and carafe are all correctly installed. Many Swan models will not start unless all components are in place.
  • Check display indicators: Some models show icons for lid or carafe; if one is flashing, reseat that component.
  • Try a different program: Attempt a manual brew or cleaning cycle to see if any mode will start.

Button and switch checks:

  • Press the start button firmly and hold for 1–2 seconds. If the button feels loose or does not click, the keypad may be worn.
  • Inspect and test the lid and carafe micro-switches for proper operation (click and continuity) if you can safely access them.

If all mechanical parts are correctly seated and switches test good, the control PCB or keypad membrane may need replacement.

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Repair Difficulty

Medium 3/5

Required Part

Lid Micro-switch / Control Panel Keypad
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