Oven light works, but the oven will not start heating until the clock is set; no explicit error code is displayed.

Safety first: No internal work is needed for basic checks.

• Set the clock: Use the control panel to set the correct time. Many De Dietrich ovens will not heat if the clock is unset or flashing.
• Cancel automatic programs: Ensure the timer is not set to a delayed start or end time. Cancel any active programs and return to manual mode.
• Test manual mode: Select a simple heating function and set a temperature. Confirm that the heating indicator appears.
• Timer fault: If the oven still refuses to heat despite correct settings, the timer relay or PCB may be faulty and require replacement.