Ikea Start Circuit / Safety Interlock Not Engaging

Microwave display works but pressing START does nothing; no relay click, no fan, no light.

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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

Faulty door interlock switch, Misaligned door, Defective START button on keypad, Failed relay on control board

How to Fix / Troubleshooting

Safety: Unplug before adjusting door hardware or opening the cabinet.

Steps:

  • 1. Check door closure: Ensure the door is fully closed and that you hear a firm click. Gently lift the door while closing to see if alignment improves.
  • 2. Try multiple keys: If other keys also fail or respond intermittently, the keypad or control board may be faulty.
  • 3. Child lock: Confirm that the child lock is not active (usually indicated by a key symbol). Follow the manual to disable it.
  • 4. Door switch test (DIYers): Access the door switch assembly and test each switch for continuity when the door is closed.

Resolution: Replace the door interlock switch assembly or membrane keypad as needed with IKEA-compatible parts.

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Repair Difficulty

Medium 3/5

Required Part

Door Interlock Switch Assembly
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