Thanks Ron, Neil and Joseph lotsa good ideas. I am not really handy or spry (will be 80 in a month) but I crawled under the kiln today, disconnected things and, using the perturbation method, got the motor working again. I recently bought new ducting so now its the collection box that has to be replaced - any more perturbation of that and it will be a pile of rust. Joseph your message indicated that you can buy the box separately from the rest of the system, I guess the next step is to get in touch with L&L and see if they'll sell me one. Thanks everyone for all the help, Joan.