Caravan fridge

[clivvy]

Hey guys, we are still tinkering away with our caravan. I know nothing about caravans, but I'm learning. Now, grudges, silly question, but how do they work? Let me explain my silly question. We are going to leave the van plugged in thus weekend, so that we can use the fridge at the weekend. I've plugged in the mains electric, turned it on and the small compartment is very cold to touch, but the larger compartment isn't very cold at all. There's no sound either, so I'm not sure how a caravan fridge is meant to work!? Any tips also, on making sure the fridge is operating correctly, and safely?

Cheers!