I have a Neff U1421 N0GB/01 double oven. The element went with a bang and this was duly changed. I was still getting no heat, but the fan and the lights worked OK. I then changed the thermostat as it had stopped ‘clicking’, (like the small oven’s did), when turned off and on. But I am still getting no heat!! Can anyone point me in the direction of what could be the problem now? Is there a safety cut-out or thermal fuse that needs changing? Thanks.