WPL FF flashing light temp problems 850141915052 ARC4190/21X

Hi.
I have had a look at a 850141915052 ARC4190/21X
The customer reports that the light flashes like mad and the temp reading on the lcd display drops on the freezer when the door is opened.

I popped around to have a look and after the door being open for 5 mins it went a little mad.

Fridge light has very random flashing with a relay clicking on the back and the freezer temp dropped from -18 to -4 in about 60 seconds.

I would guess this is the main pcb but cant see anything on it and as its a special order I wondered if anyone has come across this before im stuck with a new pcb.

Thanks all