Is there a fuse for the fan in an Lreg Cavalier TDS?

We presumed it was a faulty fuse for the fan which meant that the car would overheat after driving a while, especially in warm weather, but there doesn't seem to be a port for a fuse for the fan. Does this mean we're looking at a thermostat problem or is there another way we can check that the fan actually works?

Help please as it's our only way of taking the kids camping in a couple of weeks!!!

Many thanks, Louise