Thetford Cassette Toilet

As it’s a ‘manual’ (ie not electric), there won’t be a fuse. Silly question, but have you filled the flush tank? From memory, it usually takes a few twists to prime the flush. 

yeh we have filled the flush tank and we turned loads thanks

To flush the tank you need to push down on the left hand knob after turning it to unlock. The large knob on the right is just a cover for a spare toilet roll.

If you need to service it you can download information from Thetford

With this link

thanks tried that still not flushing but when I turn handle rapidly I get small amount of water coming through do you have any ideas thanks for your advice