What FC E4 Means
FC E4 is published specifically as a possible problem with the wire harness connecting the cooktop user interface touchpad to the induction module. Unusually for a cooktop code, it names the wiring itself rather than either part at its ends.
Common Causes of FC E4
- Harness connector loose at one end
- Harness chafed or heat-damaged
- Connector disturbed during recent work under the worktop
- Pin corrosion at a connector
🔧 One Safe Check You Can Try
Reset at the breaker for a minute and test a zone on low. If the code returns, the named harness needs inspecting, which means lifting the cooktop out with the supply isolated. What you can usefully contribute is a note on whether the fault is intermittent and whether anything has been worked on beneath the cooktop recently - a harness disturbed during an oven replacement or a worktop repair is a common trigger for a connection code.
⚠ Why You Shouldn't Go Further Than That
- The harness runs under the glass beside high-current wiring.
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.