Regarding my Aeg HC3360M stainless steel chimney hob: the control knobs for the extractor fan will only work when held down. otherwise it stops working. However, the bulb/light knobs operates properly and lights up. What is wrong? Which part/s is the culprit? My Hob AEG 21602gm has one burner not working. I want to get a replacement and have seen something advertised on Ebay. Can an engineer replace this for me? Where to get a reliable engineer and idea of cost please. Thank you
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