Lamona LAM1763 not working U4 error code?

I have a Lamona hob 1763 and have the error code U & 4 appear on top two and 0s on bottom two, also has a high pitch alarm after turning on… only way to stop it is to turn off at the mains… Any ideas?
Adrian, October 2021


done
This MIGHT help

https://www.howtomendit.com/answers.php?id=427759

However this suggests you may be flogging a dead horse:

https://community.screwfix.com/threads/howdens-applinces.103637/



Dty6d, October 2021
link Click here to see other fixes for Lamona.