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- Carl Curtis
- Member Since: 28 Nov 2025
- Location: Coventry
- Posts: 5
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.
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- PRH
- Member Since: 15 Feb 2018
- Location: South
- Posts: 87
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- Carl Curtis
- Member Since: 28 Nov 2025
- Location: Coventry
- Posts: 5
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Thanks for reply.
I will check if the noise goes away if I switch of the the system completely.
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- Mole HD
- Member Since: 18 Nov 2024
- Location: Orkney Islands
- Posts: 653
Thanks PRH...I was about to link that other thread on here
Welcome to the forum Carl, you'll usually get a reply for questions asked on here...if we can of course
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.
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- Carl Curtis
- Member Since: 28 Nov 2025
- Location: Coventry
- Posts: 5
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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!
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- PRH
- Member Since: 15 Feb 2018
- Location: South
- Posts: 87
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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......
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- Carl Curtis
- Member Since: 28 Nov 2025
- Location: Coventry
- Posts: 5
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Thanks PRH.
No its 100% just behind the top of the dash.
Definitely not coming from that low.
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- Carl Curtis
- Member Since: 28 Nov 2025
- Location: Coventry
- Posts: 5
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So. It turns out that the windscreen has become unsealed.
the strange noise was due to air either escaping or coming through the seal.
This was discovered by a passenger pocking around by the rear view mirror assembly.
If I pushed the windscreen at the top by the rear view mirror you could see it moving. Pushing the window made the noise worsen.
Was actually concerned that if I pushed it any harder it would come out!!
It has now been sat at Sytner Landrover for about 5 weeks awaiting the delivery of the replacement windscreen which JLR amazingly dont have in stock.
JLR/Sytner have agreed to replace FOC and supplied me with a replacement vehicle. In fact Sytner have been faultless in their approach to this and feel sorry for them actually having to deal with this now obviously reoccurring problem.
I was informed they have four other Discoveries awaiting replacement windows!!
I will update when the windscreen is fitted.
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