EHA fault coming up on straightner display?

Hi Just wondered if you could answer this question?

Whenever my mrs turns on her corioliss C2 straighners they ciome up with EHA on digital display and dont warm up. I am an electrician and think that the problem could be from the heat element at the power to disdplay connnection point not sending current through due to a poor connection. Could you e-mail me back and give me some sort of idea please if you could.
Many Thanks