While you wait for answers, we may have found some information which could help you.
Click here for Thetford Toilet FlushThetford Cassette C2 toilet Fuse cannot be inserted ?
How can I fix the cassette toilet flush on my thetford c2?
toilet ?
my thetford aqua magic leaks when flushing?
Thetford fridge leaking water?
how to remove fuse thetford?