Fridged

So Wednesday or Thursday we notice that the fridge was not a cool as it probably should have been. Anne turned down the temperature setting but that didn't see to help. By Friday, the inside of the fridge was definitely around room temperature. Keep in mind this is NOT the freezer part, it was running just fine.
I asked a handy neighbour Saturday morning if he had any ideas and he suggested that a fan may have stopped or it was clogged or whatever.
So I pulled it out and had a look. It turns out a fridge is very simple on the outside aside from a little dust and dirt the fan and radiator were fine.
Long story short, I figured out the inside part of the fridge, sort of behind the freezer part, was just chock full of ice. So we left it unplugged over night and today it seems to be working fine once again.
Close call on a hefty bill there.