Cooktop Diagnostics

Thermador Cooktop
Error Codes

Meanings, severity levels, safe checks you can perform, and when to call a technician.

Enter the code shown on your cooktop display

Is it safe to keep using it?

Depends on code severity. Low/Medium codes often allow continued use, High severity requires immediate stop.

Can error codes be reset?

Some codes clear after power cycle. Persistent codes indicate underlying issues needing repair.

When should I stop using it?

Stop immediately for water leak codes, burning smell, or any High severity error.

Most Common Codes

E1 E2 E3 E4 E5 E8 H E6 E7 EA

All Codes

E1 E2 E3 E4 E5 E6 E7 E8 E9 EA H

Error Code Directory

Click any code for detailed troubleshooting steps

Low Medium High

Code Meaning Severity Common Symptom

E1 Zone Overtemperature High The zone you are cooking on turns off without warning and the heat setting display flashes E1. View E2 Zone Temperature Sensor Fault High One or more zones on the Thermador Masterpiece or Liberty cooktop show E2 and will not heat when selected, while other zones work normally. View E3 Power Board Overheat High Every zone on the Thermador Masterpiece or Freedom cooktop goes offline at once rather than just one zone — a signal that the fault is in the central electronics. View E4 Control Communication Fault High The cooktop surface does not respond to touch input. Pressing any control key has no effect and the display either shows E4 or goes blank. View E5 Display Board Failure Medium The heat level indicators, zone selection icons, or timer display show random characters or become completely dark while the cooktop is still powered. View E6 Power Board Failed High No zone responds to touch commands and no residual heat indicator appears on any burner position — the power board is not generating any induction field. View E7 Power Board Sensor Failed High The cooktop starts and heats normally but shuts all zones down and shows E7 after a few minutes of operation, as the board sensor check trips during normal warm-up. View E8 Cooling Fan Malfunction High Thermador induction cooktops produce a noticeable fan hum during cooking. Silence from the underside during active use is a sign the fan is not running. View E9 Cooking Zone Not Connected High Touching a particular zone position on the glass surface triggers E9 immediately, while the remaining zones heat without any fault code — pointing to a wiring or connection issue on that specific zone. View EA Cooking Zone Incompatible Medium The fault first appeared after a technician replaced a zone coil or module, with EA showing on the replaced zone every time it is selected. View H Residual Heat Warning Low After finishing cooking and turning a zone off, the zone position continues to show H on the display for several minutes to over an hour. View