What F4 Means
F4 means the touch-control indicator lights are fluctuating inconsistently, related to F2's pulsating-light symptom but a distinct fault code.
Common Causes of F4
- Grease film or moisture affecting the sensor strip
- Failed sensor strip component
- Loose connector to the control board
🔧 One Safe Check You Can Try
Wipe the control area clean and dry, and observe whether the fluctuation happens consistently or only intermittently, which is useful for diagnosis.
⚠ Why You Shouldn't Go Further Than That
- An intermittent electronic fault like this is difficult to catch and confirm without observing it directly, which is easier for a technician with the cooktop open than for an owner guessing from the surface.
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.