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Home > Technical (L322) > FBH still running when engine warm 3.6 TDV8

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MarianaWestminster

Member Since: 14 Jun 2018
Location: UK
Posts: 728

FBH still running when engine warm 3.6 TDV8

Hi all,

I've noticed recently that my FBH comes on when I start the car but even after a good run (1 hour plus) with the engine fully warmed up the FBH is still running.

Is this the correct operation?

Many thanks

25th Jan 2020 9:20am

Weegie

Member Since: 09 Jun 2014
Location: East Sussex
Posts: 3255

2008 Range Rover Vogue TDV8 Stornoway Grey

Doesn't seem right. Mine switches off after a relatively short time. John
2008 Stornoway Grey 3.6 Tdv8 Vogue - SOLD
2005 TD6 Java Black Vogue - Written off!!
GAP iiD BT-Sold

25th Jan 2020 11:49am

MarianaWestminster

Member Since: 14 Jun 2018
Location: UK
Posts: 728

I imagined it would turn off when a certain coolant temp was reached.

Checked the coolant temp with my new IID tool after the 1:20 journey and 3 minutes idling it was showing 82 degrees C.

Will have a look at the workshop manual

25th Jan 2020 12:00pm

kevinp

Member Since: 28 Sep 2019
Location: Telford
Posts: 1293

2011 Range Rover Autobiography TDV8 Santorini Black

Re: FBH still running when engine warm 3.6 TDV8

MarianaWestminster wrote:
Hi all,

I've noticed recently that my FBH comes on when I start the car but even after a good run (1 hour plus) with the engine fully warmed up the FBH is still running.

Is this the correct operation?

Many thanks

I think mine is to. I just drove 3 miles and parked up for 10 minutes. Then drove a few hundred yards and parked up to be greeted with a cloud a diesel smelling smoke coming from the wheel arch.

25th Jan 2020 12:10pm

MarianaWestminster

Member Since: 14 Jun 2018
Location: UK
Posts: 728

According to the WSM the FBH runs in auxiliary heating mode until one of a set of conditions is met.

One of these conditions being the engine coolant temperature exceeding 75 degrees C.

I will test again later when I go out.

25th Jan 2020 12:24pm

MarianaWestminster

Member Since: 14 Jun 2018
Location: UK
Posts: 728

Click image to enlarge

25th Jan 2020 12:24pm

kevinp

Member Since: 28 Sep 2019
Location: Telford
Posts: 1293

MarianaWestminster wrote:
According to the WSM the FBH runs in auxiliary heating mode until one of a set of conditions is met.

One of these conditions being the engine coolant temperature exceeding 75 degrees C.

I will test again later when I go out.

25th Jan 2020 12:30pm

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