Not sure if I need to worry ( yet ) but I noticed last week that the extractor had cut out for no apparent reason . No problem , once I noticed I switched it back on . But it happened several times , and today it switched itself off twice . Also , when I was packing up for the day , when I touched the red button on the wall switch , the switch " chattered " in a " mechanical " way . Bearing in mind that the arrangements are those I have been using for about 15 years , could it be the switch ? . Or the temperature ? .
Suggestions welcome .
Steve