Induction hob shows E4 on one or more zones and they do not heat.

Safety first: Disconnect from mains and wait at least 10 minutes for capacitors to discharge. Do not operate the hob if E4 persists; risk of further damage.

• Visual inspection: Remove the hob and bottom cover. Look for burn marks, cracked components, or melted insulation around the affected zone’s coil and power module.
• Check for moisture: Inspect for signs of liquid spills that may have reached the electronics. Dry thoroughly and clean with isopropyl alcohol if minor; severe damage requires part replacement.
• Continuity test (advanced): With a multimeter, measure resistance of the induction coil. A very low or zero reading may indicate a shorted coil.

When to call a technician: Overcurrent faults almost always require replacement of the power module and sometimes the coil. This is a high-voltage repair and should be done by an authorized Teka service center.