Sorry just to confirm, Do you mean the back panel interior or external back panel?
I have been at work; there is ice behind the drawers on the back panel. I will turn off the fridge but as the appliance is a fridge freezer I cannot switch it off at the moment as I have food in the freezer and I have no other facility to store it in. However I will turn it off asap. If I need to get back to you will I have to pay another amount of money as I will only need to get back to you about the same appliance?