Posted on 28 Aug 2013
Well I thought I'd have a go at fixing the pump myself, and it was a doddle. First purchase a pump. I paid £15 off eBay for a new German version(The original Thetford pump costs about £30).
Remove the switch housing on top of the toilet by pulling upwards. Remove 4 screws holding the inner unit together. Pull old pump up & out, then cut wires near switch and disconnect the hose. Crimp new wires and push on hose to new pump. Cover electric with rubber seal and put it all back together. And a presto, jobs a good'un. and the toilet is now flushing perfectly.
Time taken to repair 15 minutes!