Hi Mark,Thank you for using Just Answer my name is ***** ***** I will help with your question. It sounds like on of the buttons is stuck down, do you feel a click when you push the buttons or does a button feel different to the rest?
Do they feel different when you press them. It could be that one of the micro switches has gone short circuit have you remove the timer module from the cooker?
I did mean the item behind the fascia. How do the buttons feel when you press them does one feel different?
Could you send me a photo of the cooker.I suspect to get the fascia panel you need to take the top off the cooker. There is likely to be screws at the back and the sides.
Do you have a local electronics repair shop or would you be able to replace the microswitches yourself. I would suggest removing the module and then replacing all of the micro switches, they will be soldered in.
Thanks for the pictures you will need to remove the oven first. If you open the oven door your should find the screw that screw it back to the woodwork. Once the oven is out the top should be easy to remove. You will need to turn of the cooker first at the switched spur or the cooker point.