Hi, I purchased a new fuel burning heater pump a few months back as I had a fault code saying open circuit. Eventually got around to replacing it and all worked great or so I thought. Timer worked, manual heat and key fob. Set it on timer to come on this morning and not working again. I had been for a drive after as I read somewhere that you had to drive between operations. So yesterday I had no fault codes and today I have the following fault codes attached. Is there a common issue for these or have I done something wrong? Thanks for any help..

it wont come on if the fuel level is below a certain amount, for if the battery isnt in tiptop charge. First time FFRR owner

Yeh sorry forgot to mention battery fully charged and full tank.

It also only comes on once between engine starts, so if you had bene playing with it prior to today it would disable it, assuming the engine hadn't been started in the period.

I however doubt that would throw the code you have. L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

Yeh started and moved it yesterday after it was working. Also went for a good drive today to check that was not the issue.

Error codes now attached

Does it only function below a certain temperature..? I thought it was 4 degrees? Ash
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2016 SDV8 AB

Yes it was -1 this morning. And about 2 deg when I went for a drive and tried again. I can clear the fault codes but they keep coming back.

If I need to tackle these 1 by 1 is the auxiliary heater control module the one that the remote operates in the boot or is there another module? And are the flame sensor and overheat sensor just part of the burner or can they be fixed? Just strange I had no fault codes after changing the pump and all working now these faults.

All those faults are in the FBH. It has its own ECU.
I don't know how often they fail, but mine has failed, and blows the fuse, and Christian and Vera from LRTime had theirs fail too.

Thanks so do you think it could just be a fuse? If so do you happen to know which one? Or more than likely a replacement heater.

I don't think it's the fuse for you. In my experience that would give you a B129A-88 code (LIN Bus "D" - Bus off).
I wonder whether you could chase down individual faults in the heater, but the spare part prices mean that it's not long before you're at the price of a used FBH. Of course that then probably has no guarantee with it...

Thanks will have a check anyway if not it’s worth the risk of a second hand one to me.

comports wrote:

Does it only function below a certain temperature..? I thought it was 4 degrees?

I can confirm
It was 4 deg last night around midnight, I had been charging via ctek I removed leads and started car to move from garage to front of house. It was very quiet and for the first time when I switched off the engine, I heard and smelled the FBH was operating. Not really noticed it before its so quite. And here in Norfolk not seen any snow this year  2018 SE SDV8 4.4 Byron Blue