Already dunit  
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

SteveMFr wrote:

If you've driven the RR in the cold and the FBH has come on in its function as an additional heater - and you've not driven long enough to have the FBH shut down during the drive, when you shut off the motor you'll hear the FBH clearing itself for another minute or two. It is no longer burning at this point, just blowing air through the chamber.

Steve.. Is this also relevant to the 2006MY ? If it is, I think you've solved my 'problem' What I thought was the FBH operating after I stopped the car, was actually the sound of the 'clearing out process'. It seemed to be random, but I guess it was only after a short journey, and only when it's still cold

It will be johnte.
If you hang around it should only be on for a minute or two

I've also just read on another thread that the 'tapping' noise that I can hear round the spare wheel well area, could be the FBH fuel pump. This makes sense. As when I leave the car running to look for the noise, by the time I get everything out of the boot + spare wheel + jack- The tapping stops....

As I now understand - which I didn't realise before (please correct me if I'm wrong) The FBH will start up when the engine is started to help warm up the car quickly on a cold morning.

I'm so glad I found this forum..

Exactly.

Correct.



Yes, the info applies to all FBHs. 
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

MY11 FBH = auxiliary heater?

Er, no.
It pre-heats the cabin or the engine on the MY11 FFRR.

I refer you to page 62 of the Handbook .
" Note. The programme will cease operation if the engine is started."

I stand by what I stated earlier. In fact, this curiosity and others with the MY11 FFRR will be tested by some technicians from LR HQ next month.

Design fault? Perhaps. We all know the MY11 FFRR is fudged with the electrics and FBH.

Steve

"The ATC ECU disables FBH operation if battery voltage is too low.
l When the engine is off the low voltage limit is 11.4 V for more than 10 seconds; the system is re-enabled if battery
voltage increases to 12.2 V "

would be to quote you, and elegant way to describe what I said.

Remember in the MY11, which I and Autobiogarphy have, that the FBH shuts down when the engine is on.

Hi Rambles,
I was not discounting what you said - I was asking for substantiation as I'd never heard that before. Shutting down and starting an FBH is not like clicking a light on and off. It takes the FBH easily 45 seconds to ignite, much longer to produce heat, and longer to shut down - even your MY 11 FBH.

And I understand that that the 2010> electrics are quirky (maybe because the Teutonic influence has now completely dissipated and we're back to Brit automotive electrics? ) but if the TDV8 needed additional heat prior to 2010 why should yours not? Your quote from P. 62 " Note. The programme will cease operation if the engine is started." simply means that the Park-heat sequence you've started ends with starting the engine. That's not the same as saying the FBH shuts down. It simply enters another program.

The quote you've taken from the RAVE does not describe what you're saying for the earlier MYs. What it says is that the FBH starts its shut down sequence at '11.4 V for more than 10 seconds' and can not be (manually) restarted until the voltage has increased to 12.2V - when the system has been re-enabled.

And... What's the 'Er, I think not' about? That the TDV8 needs addtl heat simply means that your TDV8 is efficient. It produces very little waste heat (in contrast to the petrol engines).

I'll be very curious to hear what the factory techs say - please keep us informed. 
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

Steve wonder if you might have any thoughts on my probelm / question.?

I have a 2005 TD6 with touchscreen, i have the option on the screen timed climate and it states on the screen heating or ventilation. I have the option to set two timed periods and a manual softkey. I have set a timed switch in and the light above top left hand button duly flashes as per handbook, i hear the fans come on at said time, but do not seem to get any heat. If i use the manual softket, it highlights in green with finger on it but then outlines it in red and nothing at happens ( sory this is with the key in position I).

I do not have the rempote facility or at least i can see not receiver in the boot behind the fuse box just my tracker and PDC box.

The FBH seems to work when i switch the engine on whens it is cold as you can here that familiar noise on the left hand side of the engine, or at least i beleive that is the FBH runningg/

Any help appreciated.

As I mentioned in the FBH thread in the technical section, my experience is actually with heaters a gen older than these, but if I were to venture a guess, I'd say either the heater is not igniting (and you are only hearing the combustion air blower - this shuts off after a bit though) or the water pump is not up to snuff (although this should cause a heater to overheat and shut down. Or the heat is actually getting inside the car but the blowers /flaps aren't letting it out.

Start your RR when it's under 5°C and let it idle while listening for the FBH. There should be a high pitched whine and after about 30-45 secs a def change in pitch as the heater ignites (jet engine sound). Hold your hand under the FBH exhaust - should be warm. Try the same on Park-heat. Feel the heater hoses to see if they are warm and just follow the heat inside bit by bit. 
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

Steve

Agree the FBH takes a few minutes to start generating noticable heat.
Agree it takes a few minutes to cool down.

As I understand the FBH to operate on the TDV8 4.4s, it is as a park heater only.
I can recreate the symptoms as described by Autobiography.
And it makes no difference if the journey time is 10 minutes, or 1 hour.

So.....
use FBH remotely to pre-heat cabin.
after 20 minutes, get into cold cabin and see low battery warning displayed on dash board.
start 2 hour drive to visit friends. stop to get diesel after driving 1 hour. fill tank. pay at kiosk. come back to car and notice FBH is operating. get back into car, complete remainder of journey. switch off ignition. after a couple of minutes notice the FBH has turned itself back on !
AND....if you let it, it will complete the remainder of the cycle until either it thinks it has done the full 17 minutes (which is all you get these days, or you risk having non start problems) or the battery says it is low again. In which case the whole madness is saved to start again when you next use the car.
seems to be a great design feature that the FBH "pre" heats the car after the journey has been completed.

Experienced the same on a 2008 TDV8 - once you'd parked up (didn't seem to be any pattern to it regarding length of journey), you could sometimes hear the heater running and see the exhaust venting from the N/S front wheel arch. It only seemed to happen when the outside temperature was fairly low, the remote fob was never touched (in fact, it wasn't even on the key ring).

It's amazing that LR still can't sort out something so simple.

Update...

I've had it confirmed that this is 'normal' by dealer and that it is simpy the Webasto heated shutting itself down - it is not instantly switched off with the engine and needs to cool down etc. Meanwhile, the 'bar' on the Auto button on the inside of the car stays flashing. Fuel pump not clicking in this mode so does seem to be cooling down and not drawing more fuel in.

Have noticed that as soon as I unlock the car when it's cold the FBH comes on. Normal? Have been told the car has been on diagnostics and the heater is working 100% as it should.

Hmmm.

the FBH should come on as soon as the door is unlocked / opened? and your dealer told you that was normal?
doesn't happen with my MY11 FFRR.
and it doesn't say in the handbook the FBH is turned on that way.

sounds like your stealer is fobbing you off.
FBH should not operate on the MY11 just because the door is opened.

There is an easy test at the dealer.....go unlock the door of the demonstrator.....and see what happens.

Here's an idea...

When you switch FBH on, take note of the time. Note the time you start your journey. When you end your journey and lock up, note the time the FBH starts up, let it run, note time it stops by itself. Should equal 17 minutes, yes? Previously..
Vogue SE TD6
Defender 90 2.4
Defender 110 TD5
Vogue 3.5 EFI