OBH Nordica EMI Suppression / Shielding Issue

Microwave produces radio or Wi‑Fi interference when operating.

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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 line filter board, Damaged door RF gasket, Loose chassis screws affecting grounding, Use on ungrounded outlet

How to Fix / Troubleshooting

Safety first: Unplug the microwave before checking grounding or internal filters.

  • Step 1 – Verify grounding: Ensure the microwave is plugged into a properly grounded outlet. Do not use ungrounded adapters.
  • Step 2 – Inspect door seal and mesh: Check the metal mesh in the door glass and the RF gasket around the door frame for damage or gaps.
  • Step 3 – Tighten chassis screws: Loose screws can compromise shielding. Tighten all accessible external screws.
  • Step 4 – Line filter board: If interference persists, the EMI filter on the input may be faulty. Have a technician test and replace the line filter board.
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Repair Difficulty

Medium 3/5

Required Part

Line Filter / EMI Filter Board
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