Residual heat indicator stays on even when the zone is cold.

Safety first: Treat the zone as hot until you are sure it is cold to the touch.

• Power reset: Turn off the hob at the breaker for several minutes, then restore power.
• Check actual temperature: Confirm the glass is truly cold. If warm, the indicator may be correct.

When to call a technician: If the indicator remains on for days with a cold surface, the sensor or control board may need replacement.