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itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
 
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| Standard FBH operation when engine warm? |
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Hi everyone
Does the FBH continue to operate when the engine is up to temperature (when below the lower limit external temperature)?
For instance, you start the car from cold at 0c, FBH kicks in and you drive along, engine gets up to temp, but then you hit a load of traffic or start driving slowly in a city. Engine temp starts to drop, does the FBH kick back in to keep it at correct temp?
Thanks
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 17th Feb 2021 7:09 am |
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Admirable
Member Since: 19 Jul 2015
Location: Fife
Posts: 1039
 
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Yes
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| 17th Feb 2021 7:54 am |
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aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2463
 
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Yes if the external temperature is below 8 degrees and the coolant temp is below 78 degrees
I may be wrong on the temperatures but you get the idea of how it works Andrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
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| 17th Feb 2021 8:14 am |
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itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
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Thanks
I suspected this might be the case because the other day when it was about -4 outside, the car got up to temp on the gauge (so needle horizontal / half way exactly) and then when I got to my destination in a city, after some slower driving I stopped and the FBH was shutting itself down after I had switched the car off. I just assumed it was giving it some assistance to keep the car warm.
Clever stuff !
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| 17th Feb 2021 8:25 am |
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Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
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Ahum... that is its sole purpose.... it IS an auxiliary heater.......
Because the efficiency of this engine is "too" high, to get it warm enough below 7 degrees celcius...
It is NOT a parking heater......
Can be upgraded to one though, but by default... auxiliary heater.. Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc. 
Last edited by Motolab on 18th Feb 2021 3:47 pm. Edited 1 time in total
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| 17th Feb 2021 9:41 pm |
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lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
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In the winter the FBH can be running pretty much the whole time, the engine seems capable of dumping heat very fast in low load situations, notice how quick the temp guage drops when car swicthed off for 1/2 an hour or so when cold outside.
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| 18th Feb 2021 3:27 pm |
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