Oven fan runs but there is no heat in any mode; E14 is displayed indicating a safety thermostat issue.

Safety first: Disconnect power and allow the oven to cool completely before accessing the thermostat.

Check the safety thermostat:

• Locate the safety thermostat, usually mounted on the top or rear of the oven cavity, often with a red reset button on some models.
• If a manual reset button is present, press it firmly until you feel a click. This may restore operation if the thermostat had tripped.
• With power still disconnected, remove one wire from the thermostat and measure continuity across its terminals. An open circuit (with no reset button) indicates a failed thermostat that must be replaced.
• Inspect surrounding insulation and wiring for signs of overheating that may have caused the trip.
• Ensure that the cooling fan is working correctly and that ventilation slots around the oven are not blocked.
• Replace the safety thermostat with the correct Teka part if it is defective.

After repair: Restore power and test heating functions. If the thermostat trips again, investigate underlying overheating causes such as a failed cooling fan or blocked vents.