Halogen Heater (Shenley Church End MK5)

Had this a few years and always worked well but one of the three heat settings stopped working, possibly needs a new halogen tube perhaps. The other two heat settings work fine and will warm a small room quite quickly. Built-in oscillating function and ant-tip protection and I think it also has overheat protection but I no longer have a manual to check that. Photo is for illustration purposes only, although mine looks the same, the front grill is silver, not black as shown in photo.