Re: Bosch vented dryer
think the customer is getting wrong end of stick
according to the owners manual the light is only sensing filter and air blockages and does not detect sensors (attached)
the sensors as with most dryers is a conductivity sensor. if its contaminated then it wont sense. tumble dryer sheets can cause this and bosch mention lime scale in the manual
you need to look at the machine to know. check air flow, check filter is actually clean and you can see through it.
try a timed programme. these often use half heat but ignore dryness sensors
dave