What E4E Means
Bertazzoni's own induction hob manual states E4E means "abnormal supply voltage (too low)" — the cooktop's electronics are receiving incoming power below the range the appliance is designed to safely and reliably operate within.
Common Causes of E4E
- Undersized wiring or a breaker not rated for the appliance's draw
- Too many appliances sharing the same circuit, causing voltage sag under load
- A genuine utility-side voltage irregularity
🔧 One Safe Check You Can Try
Bertazzoni's own manual instructs to check that the power supply is normal and power the unit back on once it is — this is a home electrical supply issue rather than something to troubleshoot inside the cooktop.
⚠ Why You Shouldn't Go Further Than That
- This points to a home electrical supply issue, not the cooktop itself — opening the appliance won't fix it and adds unnecessary risk.
- Low voltage under load can be a sign of a wiring or breaker problem that poses a fire risk independent of the cooktop, and needs a licensed electrician to evaluate.
- Continuing to use the cooktop on chronically low voltage can strain the induction electronics over time, causing further, cumulative damage.
- Treating this as an appliance-side defect and opening the cooktop up not only fails to fix the real wiring problem, it can forfeit warranty coverage in the process.
- Correcting home wiring or circuit sizing is licensed electrician work in most jurisdictions, not a cooktop repair at all.