E-91
Samsung
Wi‑Fi Module Communication Error
Oven displays E-91 and may not respond to Wi‑Fi or smart features.
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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 Wi‑Fi module, Loose Wi‑Fi module connector, Firmware incompatibility, Main PCB communication port failure
How to Fix / Troubleshooting
Safety first: If only Wi‑Fi is affected and cooking functions work, this is not a safety-critical fault.
- Power reset: Turn the breaker off for 5 minutes, then restore.
- Reset network settings:
- Use the oven's settings menu to reset network/Wi‑Fi and reconnect to your router.
- Inspect Wi‑Fi module (advanced):
- Disconnect power, remove the control panel, and locate the Wi‑Fi module board.
- Reseat its connector and check for damage.
- Replace Wi‑Fi module: If communication errors persist, replace the Wi‑Fi module. If that fails, the main PCB may be defective.
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Repair Difficulty
Medium
3/5
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