Just a quick note to say, thank you so much for this site, and thank you so much UK Whitegoods for providing the kit: http://shop.ukwhitegoods.co.uk/Refriger ... r+Kit.html
I've got an FRSS36AF25/3 exhibiting the classic failing rear PCB symptoms, and unfortunately, before finding this site, I replaced the water valve, and the water filter housing (it was leaking anyway), so I wasted about 60 quid on a useless repair.
But, I'm happy to report that the capacitors on the rear board completely solved my problem (which was juddery water and partially filling ice-maker). I changed all the caps for good measure.
On a related note, my ice dispenser motor failed around 3 years ago, it showed an open circuit when I removed it, so I carefully cut open the plastic housing, and discovered a tiny circuit board, which had 2 dry solder joints on it causing the open circuit. I re-soldered all the joints, and "joined" the plastic casing back together with wire and duct tape, and it's been working fine ever since. Cheaper than a new motor.