The flush is not working on my C range Thetford toilet, plenty of water, I'm told there is a fuse located under where the cassette is located, with the cassette out I cannot see this fuse, is there such a fuse, anyone else have this issue. Would like to solve the fuse issue before changing the pump, the impellor is not stuck, checked that first.
The fuse will most likely be blown. Cause will be that the pump in the bottom of water tank will be seized. You will need to replace it. Doable but not easy.