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I know it summer but my FBH still fires up.
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3
I know it summer but my FBH still fires up.

Hi
I was clearing some codes using my IID tool and cleared my FBH lockout now noticed that my FBH is running even though it warm outside and the car temp is normal any clues?
f
  
Post #21522508th Jun 2020 8:11 am
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

What does your dashboard say the outside temp is?
  
Post #21523128th Jun 2020 12:04 pm
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

15oc
  
Post #21523438th Jun 2020 3:55 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10337

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

got an iid tool ?

wants the coolant temp first think in the morning
  
Post #21523458th Jun 2020 4:02 pm
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

Not sure on the LR, but Iirc some motors have two engine temp sensors, 1 for the dash gauge amd the other for the engine ecu.
  
Post #21523808th Jun 2020 7:37 pm
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Pete
Temp this morning 8 oc just had a thought does the fbh have its own temp sensors or thermostat ? Otherwise how would it know when to shut down or not in my case.
  
Post #215299911th Jun 2020 8:52 am
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Trailered Movements
 


Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1198

United Kingdom 2011 Discovery 4 3.0 SDV6 Commercial Auto Sumatra BlackDiscovery 4

I noticed mine doing this a few weeks ago, then it stopped doing it.

Can't see any negatives, it'll keep the FBH working so no issues when the cold does come, and will reduce the time it takes for the car to warm up, win win I say.

Dave
 2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago) 
 
Post #215300411th Jun 2020 9:12 am
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Your right except if your doing hard slow work you have your fbh making heat ad your radiator and fan trying to get rid of the heat at the expense of your /my diesel.
I still think the fbh has some sort of thermostat or temp sensors anybody know? And where are they in the fbh.
  
Post #215355213th Jun 2020 7:43 am
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Motolab
 


Member Since: 18 Oct 2019
Location: Sleen
Posts: 1815

Netherlands 2006 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

They are there, but in my opinion can not trigger startup, as they are not wired and controlled for this (as far as i know...) never seen it that way...

the webasto tempsensors are for safety (over heating) and to measure the temp for controlling the "load" needed for heating...

the temp trigger is outside the webasto FBH... on universal one's an external on/of temp switch, on a LR controled by the Aircon/controller/ECU, etc.. they give it the signal to startup in case of temperature
 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. Wink 
 
Post #215357113th Jun 2020 8:29 am
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Motolab I have an iid tool can I do any testing to help it out as currently Iits un plugged . its 20oc outside and it's starts up.
That's 20 on the dash readout and the engine temp is normal yet if I plug it back in off it goes......help
  
Post #215361213th Jun 2020 10:36 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10337

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Read live values under fbh and engine

Look At all the temps with engine off
  
Post #215361513th Jun 2020 10:44 am
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Motolab
 


Member Since: 18 Oct 2019
Location: Sleen
Posts: 1815

Netherlands 2006 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

I suggest not to focus on the FBH but on the aircon related parts... they trigger the FBH normally..

Any fault code’s on the aircon parts? Body ecu and or intrumentpack Ecu i think?

Since the trigger goes by a CAN signal... can be caused by some totally different item although (something , like a lamp, or switch etc. On a totally different place in your motor acts as a startup signal)
 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. Wink 


Last edited by Motolab on 13th Jun 2020 12:59 pm. Edited 1 time in total 
Post #215361613th Jun 2020 10:46 am
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Trailered Movements
 


Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1198

United Kingdom 2011 Discovery 4 3.0 SDV6 Commercial Auto Sumatra BlackDiscovery 4

In my previous post I said mine did it and then stopped. Reading the above couple of posts and it reminded me that I had my a/c recharged and it all stopped after that.

Hope this helps.

Dave
 2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago) 
 
Post #215364513th Jun 2020 11:48 am
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