Member Since: 18 Apr 2020
Location: lans
Posts: 141
Webasto heater strange wires
Hi guys just a quick one on the heater
My webasto does not seem to start even if the outside temp is at 5c
So looking at it I can see some wires have been installed and stored into the original loom,the car is new to me ,
could anyone take a look and let me know what I have as regards these wires
Thanks in advance guys
Regards Baz
12th May 2020 8:53 am
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18561
You need to get the Webasto diagnostics on it really, there is a diagnostic kit available in the site shop: https://www.disco4.com/shop/switch.php?r=%...kin=DISCO306 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
12th May 2020 9:02 am
Bazross
Member Since: 18 Apr 2020
Location: lans
Posts: 141
On the icarsoft diagnostics it shows the coolant temp at 28c and the external temp at 5c
Will the heater not work with the coolant temp at that temperature or us it solely reliant on the outside temperature.
Also the icarsoft can reset the trouble code on the heater and its is not showing any faults
Regards Baz
Last edited by Bazross on 12th May 2020 9:07 am. Edited 1 time in total
12th May 2020 9:02 am
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18561
It should kick in under those circumstances.
If you are lucky it could just be locked out due to low fuel.
If that doesn't sort it you need to do Webasto diagnostics on it.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
12th May 2020 9:04 am
Bazross
Member Since: 18 Apr 2020
Location: lans
Posts: 141
Yep done that and nothing doing .
But no lockout on the diagnostics no faults at all unless it's a totally different diagnostics and stand alone for the heater only
12th May 2020 9:12 am
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18561
The LR/generic/aftermarket diagnostics don't really give a lot of information on the FBH.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
12th May 2020 9:13 am
Bazross
Member Since: 18 Apr 2020
Location: lans
Posts: 141
This allows you to see live data and it shows that the fbh is not fired.
I'm just looking to see if I can get to the outside temp sensor to place in the freezer to confirm it's an issue or not .
Struggling to see where it is though
12th May 2020 9:22 am
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18561
Have a search, you'll find details of where it is 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
12th May 2020 9:33 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10674
Try removing the FBH fuse in the fuse box for a few minutes.
I thought it needed to be 4°C, but can't remember
12th May 2020 11:31 am
Bazross
Member Since: 18 Apr 2020
Location: lans
Posts: 141
I've tried the fuse and unplugging the fbc still nothing I've looked behind the bumper and still cannot see the sensor taken out the fogs and headlights to have a better look cant see the is there any other way to force start the fbh
12th May 2020 11:56 am
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18561
Member Since: 18 Apr 2020
Location: lans
Posts: 141
Ok found it and force started the fbh all good
But now the bloddy instrument display is stuck on -1 but the sensor is reading correct on the diagnostics
Of 11.20
So is there a time issue for the clock on the instrument to reset or is there an issue I've caused
12th May 2020 3:14 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10674
there is massive hysteresis on the dash temperature display.
Don't worry
12th May 2020 3:33 pm
Bazross
Member Since: 18 Apr 2020
Location: lans
Posts: 141
Ok no worries thanks guys .
So while monitoring the live data the coolant was upto 82c and the clock on the dash was reading -1 so the heater is still running
Is it on a preset timer once it starts running or should it by rights cut off once it sees the coolant temp
12th May 2020 3:37 pm
colinp007
Member Since: 20 Jan 2022
Location: Bletsoe
Posts: 26
Wires from Webasto FBH question
Sorry to drag an old topic back up but I am looking to remote my FBH and I saw the question was asked what are the two wires from the FBH - black and red that go nowhere but to a blanking connector?. Do they do anything can they be used for anything? Keen to understand as much as possible before I fit any remote.
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is there any other way to force start the fbh
