Discovery 2017

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  • Carl Curtis
    Member Since: 28 Nov 2025
    Location: Coventry
    Posts: 4
    United Kingdom 
    2021 Discovery Td6 HSE Kaikoura Stone

    Strange fan related noise behind dash

    Im new here and am also a member on another Discovery 5 forum.
    My Discovery 5 is making a weird air conditioning/ventilation fan noise from somewhere behind the dash.
    It seems intermittent and changes in tone and pitch. I wondered if it could be a leaf or twig but surely there is a filter that stops large objects entering the ventilation system.
    Can someone throw some light on this please?
    Ive joined this forum this morning as I had no replies in the other forum despite several hundred views!!
    Any insight would be greatly appreciated.
    28th Nov 2025 12:12 pm
  • PRH
    Member Since: 15 Feb 2018
    Location: South
    Posts: 87
    United Kingdom 
    2019 Discovery Sd4 (180) HSE Lux Indus Silver

    Hi Carl and welcome to the Forum.

    Have you done a search on here, there was another thread a few days ago about the same.

    https://disco5.co.uk/forum/thread4286.html
    28th Nov 2025 1:31 pm
  • Carl Curtis
    Member Since: 28 Nov 2025
    Location: Coventry
    Posts: 4
    United Kingdom 
    2021 Discovery Td6 HSE Kaikoura Stone

    Thanks for reply.
    I will check if the noise goes away if I switch of the the system completely.
    28th Nov 2025 1:51 pm
  • Mole HD
    Member Since: 18 Nov 2024
    Location: Orkney Islands
    Posts: 617
    Scotland 
    2017 Discovery Td6 HSE Fuji White

    Thanks PRH...I was about to link that other thread on here Thumbs Up

    Welcome to the forum Carl, you'll usually get a reply for questions asked on here...if we can of course Laughing

    You may find it's nothing more than a stray leaf or a bit of paper on top of the pollen filter that's causing the noise...always worth having a look.
    29th Nov 2025 11:07 am
  • Carl Curtis
    Member Since: 28 Nov 2025
    Location: Coventry
    Posts: 4
    United Kingdom 
    2021 Discovery Td6 HSE Kaikoura Stone

    Thanks for welcome and reply.
    I did a bit of investigation at the weekend and can now explain the noise a bit better.
    It sounds like a wasp or large fly is behind dash.
    The noise occurs for about 2 mins and then goes away and comes back intermittently.
    It doesn't matter what the ventilation or heating is doing the noise wont stop.
    It happens if the car is moving or stationary.
    Switching to re circ makes no difference.
    I've ruled out the window seal issue fairly convincingly!
    1st Dec 2025 7:42 am
  • PRH
    Member Since: 15 Feb 2018
    Location: South
    Posts: 87
    United Kingdom 
    2019 Discovery Sd4 (180) HSE Lux Indus Silver

    Bit of a long shot but wonder if it’s something vibrating on, around or in the exhaust/cat.
    Perhaps pop the bonnet to listen......
    1st Dec 2025 12:42 pm
  • Carl Curtis
    Member Since: 28 Nov 2025
    Location: Coventry
    Posts: 4
    United Kingdom 
    2021 Discovery Td6 HSE Kaikoura Stone

    Thanks PRH.
    No its 100% just behind the top of the dash.
    Definitely not coming from that low.
    1st Dec 2025 12:57 pm
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