Thermador describes E0510 as a general error code and directs you to follow the specific on-screen instructions shown when it appears, rather than publishing one single fixed cause. The on-screen prompt itself is the first and most reliable thing to check when this code shows up.
If following the displayed instructions doesn’t clear the problem, or if it returns shortly after, that’s the point to book a diagnostic visit — our technicians will still start from Thermador’s own documented behavior for this code before assuming a deeper electronics issue.