white knight 37Aw 3kg dryer is no longer heating up?

The drum spins but there is no heat. I have read a post on here that said press the reset button, but where am I to find it on my kind of dryer? And if there isn't one, how else could this be fixed?? My better half washed all the kids bedding today and the heavens opened up lol, then to top it off, the dryer has let us down big time.. Any suggestions would be really appreciated. Thanks