#	Error	Solution
1	D or E	There is an operational fault/error. 1. Switch the appliance off and on again. a. If the fault/error was a one-off occurrence, the message will disappear. b. If the message appears again, call Bosch Customer Support at 1-800-944-2904 and specify the exact error code when calling.
2	dE and the cooking zones do not heat up	The demo mode has been activated. 1. Disconnect the appliance from the power supply for 30 seconds by switching off the circuit breaker or fuse in the electrical panel. 2. Touch any control element on the cooktop within the next 3 minutes.
3	F2	The electronics have overheated. The corresponding cooking zone has been switched off. 1. Wait until the electronics have cooled down sufficiently. 2. Touch any control element on the cooktop. 3. When the error message disappears and the electronics have cooled down sufficiently, you can continue to cook.
4	F4	The electronics have overheated. All cooking zones have switched off. 1. Wait until the electronics have cooled down sufficiently. 2. Touch any control element on the cooktop. 3. When the error message disappears and the electronics have cooled down sufficiently, you can continue to cook.
5	F5 and a signal tone	There is hot cookware near the control panel. The cooking zone has switched off to protect the electronics. 1. Remove the cookware from the control panel. 2. Wait a few seconds. 3. Touch any control element on the cooktop. 4. When the error message disappears and the electronics have cooled down sufficiently, you can continue to cook.
6	F5 with a heat level and signal tone	There is hot cookware near the control panel. The electronics are at risk of overheating. Remove the cookware from the control panel and you can continue to cook.
7	F8 + H/h and the cooking zones are not heating	The cooking zone has been operating continuously for an extended period without interaction. The automatic time limitation has been triggered. 1. Touch any control element on the cooktop. 2. You can set the cooking zone and continue to cook.
8	U400	The supply voltage is incorrect. It is outside the normal operating range. Contact your electrical utility provider or contact Bosch Customer Support at 1-800-944-2904 for assistance.