Black residue around extractor fan pcb

Discussion in 'Electricians' Talk' started by james_15, Jul 14, 2019.

  1. james_15

    james_15 New Member


    I was cleaning my bathroom fan today and I noticed some black residue like a smoke stain near the PCB. Also the side of the fan body where the PCB is feels warm. Is this a sign that the fan should be replaced? Or is it just normal from the resistor on the PCB heating up? The fan in question is pretty old. IMG_20190714_115951684-1248x1664.jpg
  2. peter palmer

    peter palmer Well-Known Member

    I wouldn't have thought so, its probably that big grey resistor getting a bit warm, its probably the power supply for the chip below and is very inefficiently powering it losing most of the energy as heat.
    james_15 likes this.
  3. james_15

    james_15 New Member

    Thanks! I just hadn't noticed it before (although I honestly can't remember when I last cleaned the fan!) This fan has lasted many years and still does its job very well so I'm glad it doesn't need replacing just yet.
  4. terrymac

    terrymac Well-Known Member

    Buy a new fan. That's seen better days .
  5. james_15

    james_15 New Member

    Thanks again. In that case I will probably replace it eventually but as long as it's not urgent it will be more convenient to wait until I redecorate the bathroom.

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