Stannah stairlift - Have a problem where the chair goes so far and then stops, a sounder then beeps at regular intervals. On trying the remote control or on-board controls, the chair moves again but can stop at any time thereafter and in no particular part of the travel.
Batteries read ok at about 12.8V - 13.5V, these being 12V 7Ah lead acid types and were fitted four years ago although the stairlift has not been used for most of this time due to the person for whom it was fitted having passed away.
Any suggestions as to why this problem occurs?