LG Oven Error Code CF7 — Left Module Communication Error
What this means
Error CF7 indicates a communication failure between the main control board and the left heating module. This is common in double-oven or induction range models where multiple modules communicate. A loose connector, damaged wire harness, or failed module can cause this error.
Step-by-step fix
4 stepsPower cycle
Turn off the breaker for 5 minutes and restore power.
Check connections
Inspect the wire harness between the main board and the left module. Reseat all connectors.
Look for damage
Check for burned, corroded, or damaged wires.
Replace faulty components
If connections are secure, the module may need replacement.
When to call a professional
Module replacement and internal wiring inspection should be done by a professional.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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