Member Since: 25 Jan 2019
Location: hampshire
Posts: 29
FBH fail finally solved
Hi all, as a quick update to my particular journey... (for ref. here and here)
I'd cleaned up the original unit inside and out, and swapped out the ceramic part and board from an RRS / D3 unit.
That board failed to chat with the D4 (and I wanted it to work 'stock' - i.e. only firing when <5C outside air temp & engine <75C).
So had to source ANOTHER FBH unit that was D4 compatible. Yeabay answered the call again.
This has solved the problem. (and I'm now able to remove and refit FBHs in a matter of minutes ha ha).
- I took the outside temp sensor off and froze it.
- Connected up webasto diagnostics, refitted the frozen sensor and started engine up hoping it would fire into life.
- It fired up perfectly. Gave a clean long burn. Coolant temp got to 77C.
- Shut off engine, watched the bars change on the software as the unit 'burned out' and cooled.
All is well - thanks to the Robbie, Martin, Flack and wider board for all its wisdom.
>> I now have a 'spare' cleaned / refurbished D3 FBH to pop on ebay.
Cheers all
arb
24th Feb 2021 1:48 pm
Beanwood
Member Since: 16 Oct 2016
Location: Nr Bristol
Posts: 58
So is your known spare cleaned D3 a TT-V, and do you actually know it works in the vehicle, rather than just with the software? (I'm looking for a temporary one whilst I clean mine)
24th Feb 2021 2:48 pm
arb
Member Since: 25 Jan 2019
Location: hampshire
Posts: 29
Hi Beanwood, yes it is a TTV unit. I can't say whether it works in a D3 natively because mine's a D4. (that was my faceplant fail - the d3 board won't chat to the d4 car, but the hardware is the same).
Pics below.
Cheers
arb
24th Feb 2021 3:06 pm
arb
Member Since: 25 Jan 2019
Location: hampshire
Posts: 29
and here's the webasto software diags report and burn profile bars pic:
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