I had the same problen ie: no flush. Removed the pump and cut the cable. I tested the pump and it worked fine but noticed one of the twin wires was blackened so instead of re-connecting decided to buy a new pump with new cable attached. Rejoining a cable which will be immersed is not for the novice as it has to have a waterproof sleeve heat moulded in place. After a few years most caravan copper cables will blacken and not conduct properly. I intend to replace both pump and switch anyway. Hope this helps towards a decision
Eric Smethurst
February 2009
Similar problem - not yet fixed, but the UK site has some fantastic pdf files on each step of how to fix a problem:
cut and paste this link to the page - http://www.thetford-europe.com/web/show/id=51449/langid=42
Paul
September 2008
Don't know but try replacing fuse and see what happens if it blows again it could be short on wiring pump or switch which is earthing.
Thetford do reasoable download drawings on parts
select parts/spares and down load the pdf file.[its better than the user manual unless you want that as well].www.thetford.com
front page top line right side click on contact us. scroll down and fill in the email form.
Rob
July 2008
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix toilets.