What F38 (Communication Error - Main Board / Inverter) Means
F38 indicates a communication error between the main control board and the induction inverter, per LG's range Help Library article.
Common Causes of F38 (Communication Error - Main Board / Inverter)
- Temporary communication glitch between the main board and inverter
- Loose or damaged connector between the boards
- Main board or inverter fault
🔧 One Safe Check You Can Try
Turn the circuit breaker for the range off, wait 30 seconds, and turn it back on.
⚠ Why You Shouldn't Go Further Than That
- If F38 persists after a breaker cycle, this is board-level electronics work inside the cooktop control housing that needs a technician.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.