hi........i know its 8 months now since your question,but i will answer it.....i presume the stairlift still moves on the up button on the wall controls! if so the arm pcb is at fault down to wear and tear/age of stairlift. i have replaced this part quite a few times now on the 215 model.stannah have obsolite the part now..but i see theres a web site under [stairlift parts]quite expensive! let me know if more problems..........regards
IAN
April 2011