Ceiling extractor fan

tony3619
tony3619 Posts: 365
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Hello, 

Started to develop a slight high pitch noise in my ceiling extractor fan. Tried cleaning but made no difference. 

Any clue on if these are easy to replace? Are they connected to the duct in the ceiling and would a new one need to be attached or is the duct a stand alone fitting that this just screws over the top? 
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  • Spray a bit of wd40 in it. Should stop it making a noise for a while at least.
    Should be easy to replace though, ducting normally clips over the top and held secure with a rip tie. There are a different diameters of ducting though, so try and make sure the replacement is the same size, think they are normally 10cm 15cm or 20cm
  • tony3619
    tony3619 Posts: 365
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    edited 23 November 2023 at 1:41PM
    Spray a bit of wd40 in it. Should stop it making a noise for a while at least.
    Should be easy to replace though, ducting normally clips over the top and held secure with a rip tie. There are a different diameters of ducting though, so try and make sure the replacement is the same size, think they are normally 10cm 15cm or 20cm
    Where do I spray the wd40? Just in that hole where the fan is?  Or do I have to take it apart 
  • tony3619
    tony3619 Posts: 365
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    Excuse the mess, it's impossible to clean! Would I just spray in there? 




  • Eldi_Dos
    Eldi_Dos Posts: 1,519
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    Before spraying anything get a old toothbrush and a hoover with a crevice nozzle and try and get most of the stoor out. You may need someone to hold the hoover up while you do this, but the more you get out the better the fan will operate.
  • ThisIsWeird
    ThisIsWeird Posts: 4,458
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    Hi Tony.
    Unless you can get the WD40 close to the bearings - and I doubt you can - I wouldn't bother.
    Just keep using it, whilst planning for its replacement. And that should be straight forward enough.
    We need to know the make and model tho'!
    What's on the removed cover? Any IDing marks or names anywhere? Photos pleeeez.
    Once it's ID'd, the fitting instructions should be a good guide.
  • tony3619
    tony3619 Posts: 365
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    I'm pretty sure it's a Greenwood Unity CV2GIP dMEV Fan SMART Timer Humidistat
  • WD40 isn't a lubricant, it's "Water Displacement". An oil based (3 in 1) or silicone lubricant better. That fan looks filthy, just unscrew it from the ceiling and take it apart and clean the blades etc. The noise is probably the blades rubbing on accumulated carp. Is that a cooker extractor? Looks like lots of grease, a new fan isn't much money and probably has a larger opening than that strange one you have. You can buy 4"/5" (100mm/125mm) fans and larger. Take it out and see what you've got, it could be the duct to the outside is blocked which is why so much dirt is accumulating and why it is making a noise.
    Signature on holiday for two weeks
  • tony3619
    tony3619 Posts: 365
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    It's not a cooker extractor. It's a separate fan In the ceiling of the kitchen. 

    I'm not gonna lie...it's been overlooked for about 5 years 😬 so probably explains the dust/grease. To be honest it's only ever made a small hum so I've never thought to clean it until now 
  • ThisIsWeird
    ThisIsWeird Posts: 4,458
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    Could be worse

  • I have found the instructions for the unit and can't quite figure out these steps incase I need it like for like replaced. 

    How would you say the unit is connected to the duct? 

    How would I connect the duct with gaining access to the roof space? 


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