Light switch on Domestic Royale not working

As I recall, it was pretty straightforward on my fridge (which is not the same model). I think it basically just snapped into place with the typical plastic tabs for snap-in switches, with spade terminals for the wires. It was pretty self-evident, in any case. I think it was necessary to take off the diffuser for the light itself (which was mounted on the same little plastic pieces).

Since they're different fridges, the setup could of course be a little different as well.