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DISCO3.CO.UK > Webasto Fuel Burning Heater

FBH failing to ignite - Smoke but no fire!

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goodo

Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 107

FBH failing to ignite - Smoke but no fire!

It’s nice to set the FBH to come on in the mornings to defrost the car before the school run. Last couple of days it’s failed to start.

I check it this morning by setting it to come on manually (from the info screen) and it made the usual jet taking off noises, and kicked out a lot of smoke, but didn’t ignite.

I’ve read the fault codes and they said

B1D29-93 no start even after restart attempt

B1D31-94 flame detected prior to normal operation

U3000-16 Control module

Any ideas? Time for a strip down and clean? Can this be done and still use the car?

Thanks

13th Jan 2022 1:09 pm

nigethecat

Member Since: 11 Sep 2016
Location: Marnoch
Posts: 4247

2016 Discovery 4 3.0 SDV6 Commercial XS Auto Corris Grey

Have you checked how much fuel is in the car ? needs at least 1/4 tank otherwise it doesn't want to play !

If you have a GAP you can test fire it I believe... I want to see the sweets before I get into your windowless van... I'm not stupid!

Corris Grey D4 Commercial SE 2016
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13th Jan 2022 6:50 pm

Flack

Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6308

2007 Discovery 3 TDV6 XS Auto Stornoway Grey

Quote:
Can this be done and still use the car?

Yes , you will need to join the two coolant pipes together, then you should be fine.

Flack

13th Jan 2022 7:52 pm

goodo

Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 107

nigethecat wrote:
Have you checked how much fuel is in the car ? needs at least 1/4 tank otherwise it doesn't want to play !

If you have a GAP you can test fire it I believe...

I just checked and there’s half a tank. Don’t have a gap tool unfortunately…. Thanks

14th Jan 2022 7:52 am

goodo

Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 107

Flack wrote:
Quote:
Can this be done and still use the car?

Yes , you will need to join the two coolant pipes together, then you should be fine.

Flack

Thanks, I’ve seen a guide by Robbie which I’ll explore in more detail. Car is 11 yrs old now, so I’m sure the FBH hasn’t been touched to date. Will consider a summer refurb.

14th Jan 2022 9:11 am

Flack

Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6308

One quick way to see if it will fire up is to pull off the air intake pipe and try to start it, while giving it a quick squirt with easy start to see if it kicks in to life.
You can fool the car by sticking the sensor in the freezer.

Flack

14th Jan 2022 9:15 am

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