I've had similar problems – the freezer works, but not the fridge. I did the usual, taking it apart and defrosting etc...gave up, called in a man...He took one look and simply said: there's a motorised flap that gets the air from below into the fridge – it freezes up and has to be replaced; the problem is not the fan etc. He's putting in a new part tomorrow but says it will go after another 3-4 years. So much for Hotpoint.
kallah
October 2010