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S60 & V60 '18> / XC60 '17> / S90 & V90 '16> / XC90 '15> General Forum for the SPA-platform 60- and 90-series models |
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curious to know what whirring sound isViews : 958 Replies : 11Users Viewing This Thread : |
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Jun 29th, 2019, 11:44 | #1 |
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curious to know what whirring sound is
I often hear a whirring sound behind the dash a minute or so after turning the engine off and still sitting in the car, its sound like a small electric motor moving a flap or something, I know this is normal and I used to hear this in my MK 1 XC90's as well but I wonder what it is, does anyone know what the noise is and what it does.
I am only curious to find out what it is, not concerned as I know its normal.
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XC90 Inscription D5 Power pulse, 2017 MY, Savile grey, Blond Nappa, Leather dash/door tops, Walnut inlays, Dark tinted windows, Air suspension, Bliss/Cross traffic alert, Xenium/7 seat comfort/Family/Winter packs, 4 zone climate, Heated rear seats. |
Jun 29th, 2019, 13:15 | #2 |
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The heating and cooling is controlled by a number of air dampers directing the air over the cooling and heating coils to get the desired temperature, then another set to direct the air to the selected ducts.
These reset back to zero position at switch off ready for the next start and to seal the cabins air off.
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Jun 29th, 2019, 16:59 | #3 |
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Mine does that too. Getting a touch louder with age....
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Currently:- MY16 XC90 T8 Momentum, Magic Blue 174k miles. MY17 V60 T4 Power Blue. Previously:- 1997 V70 T5 exPolice; 2005 V50 2.0D; 2013 XC70 D5 |
Jun 29th, 2019, 19:09 | #4 |
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I’m more curious to know what’s the whirring from under the hood AFTER I lock the car.
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Jun 29th, 2019, 19:46 | #5 | |
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Quote:
The fan, I'd guess. |
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Jun 30th, 2019, 05:15 | #6 |
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It is an electric water pump that continues to cool the turbo and possibly the cylinder head after shutting down.
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XC90 D5, 2017 Inscription. Dark Grey. Xenium pack. Winter Plus with HUD. Black leather interior with alloy trim inserts. Ownership ended June 2020, Happy motoring times! |
Jun 30th, 2019, 08:34 | #7 |
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No this is a behind the dash noise that only last less than a second as though something is being activated briefly, Chief Inspector may be correct with the climate flaps, its not a sound like a fan or pump running more a quick Bzzz.
It only happens after a delay If you sit in your car for a while after turning engine/ignition off, its not something that is continuing on after turning off. Had this on my other XC90's as well.
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XC90 Inscription D5 Power pulse, 2017 MY, Savile grey, Blond Nappa, Leather dash/door tops, Walnut inlays, Dark tinted windows, Air suspension, Bliss/Cross traffic alert, Xenium/7 seat comfort/Family/Winter packs, 4 zone climate, Heated rear seats. |
Jun 30th, 2019, 08:38 | #8 | |
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Quote:
Is this a diesel-only feature?
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Jun 30th, 2019, 09:43 | #9 |
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Steering wheel lock?
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Jun 30th, 2019, 09:46 | #10 | |
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Quote:
This is a similar noise to the one behind the dash that I refer to above, and as Quacker says there can still be cooling fan or cooling pump running, not sure which noise you are hearing.
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XC90 Inscription D5 Power pulse, 2017 MY, Savile grey, Blond Nappa, Leather dash/door tops, Walnut inlays, Dark tinted windows, Air suspension, Bliss/Cross traffic alert, Xenium/7 seat comfort/Family/Winter packs, 4 zone climate, Heated rear seats. Last edited by nu11eaf; Jun 30th, 2019 at 09:51. |
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