Neff B1422 Built in oven getting too hot and burning food

[OasisFan79]

Within the last few days our Neff built-in oven has been getting too hot and has been burning food. For instance some roast potatoes that normally take a good 30 minutes to cook have been burning after just 15 minutes at the usual temperature.

Has anyone else come across this problem before? I guess there must be a thermostat that's not regulating the temperature properly.

Any ideas where to start?

 

[OasisFan79]

Forgor to mention it started on Sunday, was ok when we used it last night, then got too hot when we used it tonight.

 

[jj4091]

You're probably correct in your assumption but as you give few details try looking here for your model http://www.espares.co.uk/search/ma1126pt1604/cookers-and-hobs/thermostats/neff