Bosch Cooktop Error Code F9
In short
PiezoControl fault (induction)
Common causes
- 1Data transmission fault between the PiezoPanel and the control / display module
- 2Loose line or connector between the two modules

Step-by-step troubleshooting
- 1
Switch the cooktop off at the breaker for one minute and back on
- 2
If F9 returns, have a technician check the lines and connectors between the PiezoPanel and the control module
- 3
The technician replaces the PiezoPanel or the control / display module if the connections are sound
You might also notice
- Touch controls do not respond
- Cooktop shows F9 at switch-on
Parts & difficulty
Repair difficulty
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Common questions
What does Bosch error code F9 mean?
Bosch error code F9 indicates: PiezoControl fault (induction). This is a medium-severity issue affecting your cooktop.
How do I fix Bosch error code F9?
(1) Switch the cooktop off at the breaker for one minute and back on (2) If F9 returns, have a technician check the lines and connectors between the PiezoPanel and the control module (3) The technician replaces the PiezoPanel or the control / display module if the connections are sound This repair typically requires professional tools and expertise.
How do I know if my cooktop has error F9?
Besides the error code on the display, common signs include: Touch controls do not respond; Cooktop shows F9 at switch-on. If you notice any of these symptoms, check your cooktop's display panel for error code F9.
How much does it cost to fix Bosch F9?
The cost depends on which part caused F9, and that is confirmed at the diagnostic visit. EasyBear: A technician arrives, inspects your appliance, and diagnoses the problem at no charge. If you decline the repair, you pay nothing — not even for the visit. Call (415) 795-7300 to book.
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