I seem to be having a similar problem with the 4 L's appearing, so I follow your instructions and er03 appears. Does this mean I have a further problem other than it being "locked"? As I've notice none of you mention that er03 comes up in place of the L's.

Any ideas people

Thanks

James, April 2017

Problem with WHAT cooker hob?

You followed "your" instructions: WHOSE? And WHAT instructions? - link back to the original post, please

Ideas: Assume what you set down in your question is all we know, because what you have just written IS all we know. We have no idea about what previous post you were looking at, what your own device is or what you are trying to cure.

Help us a bit

acp, April 2017

This question is enigmatic - the make and model are not mentioned - similar problem - is undefined. Consequently a sensible reply is difficult.

Good Luck..., April 2017