What to check, in order
- Turn it off and let it cool
Completely, before you do anything else.
- Don't use it yet
A temperature sensor reading wrongly is the usual cause of a false overheat, and it needs checking.
When to call an engineer
Before you use it again.
A repair visit will usually check the temperature sensor, the thermostat and the cooling fan.
Before you book
- Note the model and serial number. They're on a label around the oven door frame or on the back.
- Write down the exact code, and what the appliance was doing when it appeared.
- Check whether it's still under warranty. If it is, the repair may cost you nothing.
About this code
Unbranded and less common appliances don't publish one shared code list, so this page gives the most common meaning across makers. Your manual is the final word, and the model number that finds it is on a label around the oven door frame or on the back.
Last reviewed September 2026.