F9
Liebherr Internal Overcurrent / Power Management Fault

Cooktop shows F9 and shuts down when multiple zones are used at high power

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Incorrect supply wiring, Overloaded power module, Shorted IGBT on induction board, Defective current sensor

How to Fix / Troubleshooting

Safety first: Turn off the cooktop at the breaker. Do not continue to reset if the error recurs immediately.

User checks:

  • Verify that the cooktop has been installed on the correct circuit rating as specified by Liebherr (amperage and phase).
  • Avoid running all zones at maximum power simultaneously until the unit is inspected.

Technician checks:

  • Inspect the terminal block and internal wiring for signs of overheating or incorrect bridging.
  • Check each induction power module for short circuits using a multimeter (IGBTs and rectifiers).
  • Verify the integrity of current sensing components (shunt resistors, Hall sensors) on the power board.
  • If a module is shorted or current sensing is faulty, replace the affected induction power module or main power board.
Advertisements

Repair Difficulty

Professional Required 5/5

Required Part

Induction Power Module
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements