Induction cooktop displays E03 and shuts down during operation, often after extended high-power use.

Safety first: Turn off the cooktop and shut off power at the breaker before accessing internal components. Allow the unit to cool completely.

Steps:

• Check ventilation: Confirm that cabinetry below the cooktop meets Sub-Zero/Wolf clearance requirements. Remove items stored directly under the cooktop that may block airflow to the cooling fan or vents.
• Clean intake/exhaust areas: Use a vacuum with a brush attachment to gently remove dust and debris from ventilation openings under and around the cooktop.
• Verify fan operation: Restore power and run the cooktop at a moderate setting. Listen for the cooling fan. If the fan does not run or is noisy, disconnect power and access the fan assembly from below.
• Inspect and replace fan: Check the fan blades for obstructions and spin them by hand. If the fan is seized, noisy, or does not receive voltage when commanded on (check with a multimeter), replace the cooling fan with the correct OEM part.
• Check thermal interface (advanced): If the power module overheats despite proper airflow and a working fan, the thermal pads or compound between the module and heat sink may be degraded. Remove the module, clean old compound, and apply new high-temperature thermal compound or pads as specified, or replace the module assembly.

Warning: Do not bypass thermal sensors or operate the cooktop with covers removed. Overheating can cause permanent damage or fire.