Member Since: 02 Nov 2006
Location: East Lothian
Posts: 62
Humming sound when switching off
When I switch off I hear a humming sound both inside and outside. After a few minutes it stops. Is this something to do with the colder weather we are getting? Is it normal?
2nd Nov 2006 9:34 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26750
Its the Webasto supplemental heater winding down. Its the box thing with the mini exhaust, behind the left headlamp under the bonnet.
Do a search for FBH or Webasto, there is lots of history on this one!
2nd Nov 2006 9:48 pm
CJS
Member Since: 02 Nov 2006
Location: East Lothian
Posts: 62
Humming sound when switching off
Thanks a lot. What you say makes sense. I just asked a friend of mine, who also has an HSE, if he had a similar problem and he said 'no' but then he also confirmed he never puts any form of heat on or the air con!!
2nd Nov 2006 10:18 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26750
The FBH will fire up if the air temp is 5 or below and the engine is 75 degrees or below. It is fully automatic. Whether or not you use the air con or heating has no bearing on the FBH.
2nd Nov 2006 10:27 pm
CJS
Member Since: 02 Nov 2006
Location: East Lothian
Posts: 62
Humming sound when switching off
I didn't realise that. I cannot understand why my friend hasn't heard it then.
Thanks for your help.
2nd Nov 2006 10:39 pm
Winger Site Moderator
Member Since: 15 Feb 2005
Location: UK
Posts: 3428
If this is a humming after you've been driving and tha engine is at normal operating temperature it isn't the FBH purging itself. Sounds more like the high pressure systems shutting down.
How long does it take for the FBH to kick off? This morning I sat in my car for a couple of minutes after starting the engine to look for the telltale smoke, but I didn't see any sign. I think outside temp was 1 or 2.
2nd Nov 2006 10:43 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26750
It takes about a minute to show. If you were low on fuel (warning lamp on) it inhibits the FBH.
2nd Nov 2006 10:49 pm
Winger Site Moderator
Member Since: 15 Feb 2005
Location: UK
Posts: 3428
It doesn't smoke very much; you can hear it working clearly, though. It starts instantly assuming the parameters are right.
2nd Nov 2006 10:49 pm
lee01277
Member Since: 06 May 2005
Location: Shed
Posts: 821
or the fridge in the cubby box ?..............Somewhere in-between my old D3 and what's to come next .........
3rd Nov 2006 8:58 pm
Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
lee01277 wrote:
or the fridge in the cubby box ?
No that doesn't smoke DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
DS3 TDV6 HSE- Silver with Alpaca (new one) Gone
D4 HSE Lux - Montalcino Red Gone
Porsche Cayenne V8 Diesel S
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