Diplomat ADP 5426 model no-050567009. I have a top oven/grill and when I switch the power on at the mains the top oven comes on although the selector/temperature switch is still in the off position. It can go off of it's on accord and usually does so after a little while if I use the bottom oven but not always, particularly if I use the grill.
I have replaced the grill element recently. This problem existed before the new element was fitted Can anybody tell me which part is faulty?

e douglas, August 2017

Looks like some people already have - you must have somehow missed these, which were among the first results when I did a quick search:

http://www.ukwhitegoods.co.uk/forumsphpbb3/diplomat-adp5426-heating-when-not-turned-t20410.html

https://www.ukwhitegoods.co.uk/forumsphpbb3/problems-with-diplomat-range-850-adp-5426-t26269.html

https://www.justanswer.com/uk-appliance/7k4sf-diplomat-adp5426-dual-fuel-oven-top-oven-grill.html

acp, August 2017