Hello, my name is XXXXX XXXXX I am here to assist you. That is a weird model number so may I ask you is this a refrigerator?
It is a Fridge/freezer (Whirpool)
Serial No, 85 86 441 15 020
You've asked about the control board, I think it's the one on the front of the machine that you are talking about.
There are 2 control boards on your appliance so I've given links to both.
The main control board is at the bottom rear and the user control board is in the facia panel.
Click here for the main control board.
Click here for the user control board
You haven't said what the problem with the appliance is but given the cost of the parts, it may be worth getting a quote for repair from www.repaircare.co.uk
Their price includes parts and labour.
The 85 number you posted is recognised at Whirlpool as Model 20RU-D3JJ20RU-D3JJ
Hope this helps
Let me know how it goes