Hello All.
I would like to add my findings.
My fridge of 11 years started behaving exactly as the OP described. I tried all the suggestions regarding holding buttons, power off etc to no avail.
I even found an online manual here
https://www.yumpu.com/en/document/view/18647891/whirlpool-uk-refrigerator-models-wbm35lw-wbm35ls-/5
But that did not address the problem at all.
So I went back to someones suggestion about the Potency Module.
I pulled the fridge out and unscrewed the cover at the bottom left to get access to the Potency module.(Red plastic box)
Without even pulling it open I could smell the burnt electronics.
I opened up the case and found a scorch mark next to the big capacitor on the circuit board.
So far, so good.
Given that a new fridge of the same size/style is about $1300 I pursued the spare part.
I then tracked down a supplier in Melbourne with a new board/module for $148.50. P# WPP326020913
Plugged in the new board in and fired up the fridge and its working just like new.
So I am happy now that a perfectly good fridge is up and working again.
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