You have reached Justanswer UK, an independent paid question and answer platform that matches experts in various skills to customers.
My name is ***** ***** I will assist you today.
I am sorry to hear you are having trouble with your appliance.
I understand how frustrating that can be.
E5 error is voltage fault.
If it has not worked even after leaving it unplugged for days then I am afraid the control board is faulty and will need replacement.
The cost of repair will be around £250 including repair charges.
If this appliance is more than 10 years old, it may be better to buy new one then to spend this amount on repairs.
I hope this helps, please do not hesitate to ask any follow up questions.
I hope you enjoyed your experience with Justanswer UK today.
Have a wonderful day.