When I switch on the blower I hear - 30 seconds later or so a clac---clac--- clac noise.

But this noise is not coming from the dashboard as I assumed in the beginning but from the rear right wheel area. I was looking/hearing into the engine bay: nothing.

But when I looked into the right rear wheel well there it was very clear.

I then opened the trunk and the right little compartment (with the trailer hitch and the wheelbrace and electronic).
But is surprisingly I couldn't locate the noise from there. It was louder to hear from outside then inside.

Is there an electronic component in the rear area?


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Last edited by flashgordon on 16th Feb 2020 2:01pm. Edited 1 time in total

FBH pump most likely. Cheers
Richard

(there are no such things as an ordinary FullFat, an ordinary cat or too many tools)
2011 TDV8 Vogue Santorini Black
Gap IIDBT

What does “FBH“ mean?

and I should also and:
When I Switch off the heater blower knob. — and then switch it on again— then the noise usually disappears

Hi Flash

FBH = fuel fired booster heater. It's well described in the workshop manual for your 2011 FF. That's in the Wiki here

https://drive.google.com/open?id=0Byv5LFgQZqlWN1RzTVZTRGYwSmc

Look under climate/auxilliary heating/fuel fired boosteer heater/

The noise you hear is likely the pump for it, which cycles at about 1 per second, then increase to about 2 per second if required.

There's lots of threads on here about it, but a read of the WM will help to understand the piece of kit. It does seem to rely on battery voltage being sufficient and shuts down if that is too low. Also do you have a remote fob with the ON/OFF buttons? Cheers
Richard

(there are no such things as an ordinary FullFat, an ordinary cat or too many tools)
2011 TDV8 Vogue Santorini Black
Gap IIDBT

Hi Flash, FBH = Standheizung! What you hear is the fuel pump like riff already said.

Thanks a lot

I will read the manual today

But I was surprised to hear the constant clack——clack—-clack-noise in the REAR wheel well and I thought to find all FBH-related components in the right FRONT wheel well (under the battery)

The FBH itself is in the front under the battery, but the little pump that supplies the fuel to it is under the car near the tank at the rear. Thus you'll hear the clack clack at the rear.

Hope the manual helps, it's a long read  Cheers
Richard

(there are no such things as an ordinary FullFat, an ordinary cat or too many tools)
2011 TDV8 Vogue Santorini Black
Gap IIDBT

very good help

it looks indeed small

The clicking of the FBH pump is normal.

If it’s doing the click noise it is working as it should. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial

As NMJ says, it certainly sounds as if it's working correctly, so why would you think of changing it?

You are correct in saying the FBH should stop working but at the water temperature of about 75C (from the WM) and if you shut of the blower the FBH also stops.

from the WM

Additional Heating
Additional heating reduces the heater warm-up time and is also used to maintain heater performance throughout the drive
cycle.
The ATC module activates the additional heating mode when the engine is running and the following conditions coexist:
The ambient temperature is less than 1 °C (34 °F) on petrol vehicles or 8 °C (41 °F) on diesel vehicles.
The engine coolant temperature is less than 75 °C (167 °F).
The heater coolant temperature is less than 70 °C (158 °F).
The heat demand is more then 75%.
The blower is on.


To activate the additional heating mode, the ATC module energizes the auxiliary coolant pump and sends a K bus message to
the FFBH unit to start/continue operation (the changeover valve remains de-energized).


The ATC module stops the FFBH and de-energizes the auxiliary coolant pump when any of the following occur:
The engine stops.
The ambient temperature increases to more than 3 °C (37 °F) on petrol vehicles or 15 °C (59 °F) on diesel vehicles.
The engine coolant temperature increases to more than 75 °C (167 °F).
The heater coolant temperature increases to more than 70 °C (158 °F).
The heat demand decreases to less than 70%.
The blower is selected off.

I still read the WM on tihs and seem to find more information each time. Perhaps I am just slow in picking up the details  Cheers
Richard

(there are no such things as an ordinary FullFat, an ordinary cat or too many tools)
2011 TDV8 Vogue Santorini Black
Gap IIDBT

I drove the RR for more than 20 miles today and found out that the noise indeed disappeared when engine was really warm
Since I drove only 8-12 miles per trip in the last months I was not aware of that.

So I am happy as it seems I don‘t have to do (and to pay) anything.
And I learned more about the car (and how it works).
Thanks for the manual anyway.

And you know what:
When I opened ebay this morning they made some „suggestions“, the first was a Webasto FBH pump...how did they know..



SOLVED

———/////

.

Glad it helped

ebay=scary  Cheers
Richard

(there are no such things as an ordinary FullFat, an ordinary cat or too many tools)
2011 TDV8 Vogue Santorini Black
Gap IIDBT