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FBH - when does it kick in ?

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lee01277

Member Since: 06 May 2005
Location: Shed
Posts: 821

2005 Discovery 3 TDV6 S Auto Zambezi Silver

FBH - when does it kick in ?

I know this is done to death. Searching brings up zillions of returns.

I think the FBH kicks in at below 6 degrees outside temp, and below 75 degrees water temp. Am and correct ?

Ta ..............Somewhere in-between my old D3 and what's to come next .........

6th Apr 2008 7:30 pm

DSL
Keeper of the wheelie bin

Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72774

as far as I know (unless you are low enought on fuel to have the warning light on).

6th Apr 2008 7:32 pm

lee01277

Member Since: 06 May 2005
Location: Shed
Posts: 821

Ta,

Thats not good news then.

Noticed my FBH was winding down after I switched off this afternoon. Outside temp 8 degrees and the engine was well warm after a 30 min run.. ..............Somewhere in-between my old D3 and what's to come next .........

6th Apr 2008 7:36 pm

SN

Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710

you sure it was the FBH - the FBH makes a decreasing gurgling noise, not a whiny wind down noise, after you switch off - might have been the compressor Steve N | 21MY Defender

| 08MY Discovery 3 (history)

| 06MY Discovery 3 (ancient history)

6th Apr 2008 7:59 pm

lee01277

Member Since: 06 May 2005
Location: Shed
Posts: 821

yep, for sure it was the FBH. Hot gas coming out of the pipe as it was closing down. ( and yes, it was the usual gurgling noise ) ..............Somewhere in-between my old D3 and what's to come next .........

6th Apr 2008 8:08 pm

simon

Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296

2011 Discovery 4 3.0 SDV6 HSE Auto Fuji White

lee01277 wrote:
Noticed my FBH was winding down after I switched off this afternoon. Outside temp 8 degrees and the engine was well warm after a 30 min run..

Could still have been going if the engine temp was not high enough. It will startup at 5 degrees from cold to assist the engine warm up, but if you have not have enough of a run to warm up the engine, it will still be running or start up during the journey.

From Wiggs...

Quote:

Fuel consumption is quoted as:-
full load (5.2kW) 0.61 litres / hour
part load (2.5kW) 0.30 litres / hour
also bear in mind that the FFBH will run if the coolant temperature drops below 70 degrees C whilst the vehicle is in use...
Full load to part load 72 degrees C
Part load to control idle 78 degrees C
Control idle to part load 70 degrees C
Part load to full load 65 degrees C

6th Apr 2008 9:52 pm

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