W
wozz
replacing it without educating (assuming that like 99.9% no quarterly test has been carried out) is pointless. it may well have failed as it hasnt operated in 10 years, replacing it and hoping the next time its used in 10 years is so far from what it was designed for. the best thing to do is educate the user of the installation replace if you wish although there may be nothing wrong with it if used correctly. no guarantees the new one wont behave the same way if the same happened to it.