Another Eberspacher problem

D

DavidGrieves

Well-Known Member
Joined
13 Aug 2001
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423
Location
West Cumbria, Cumbria
www.wsandba.co.uk
Hi All

My eberspacher D2 12v airtronic fan motor stopped working, code 31. Tested it with the multimeter and no continuity on the motor. I must admit I balked at the price of a genuine replacement fan. I noticed an eBay seller selling aftermarket motors at 1/3 of the price of a genuine one.

Fitted it last week and all was good, ran really smooth and quiet. After about 5 hrs use the eber wouldn't start showing code 52. took it all apart and the burner tube & combustion chamber were completely choked up with carbon. I gave it a good clean, and it worked fine again. But after only 2 hrs use it slowed down, stopped and won't start. Showing code 52 again.
Opened it up again and it's full of carbon again.

So my thoughts are the fan RPM or air flow is wrong, causing it to operate too cool and carbon up the chamber. Does that sound possible?

Further thoughts are, has the seller sold me a D4 fan? I had to elongate the hole in the ECU to get the screw into the fan body, as it was a couple of mm's misaligned. But at the time I put it down the a manufacturing irregularity in the aluminium casting. Or is the D4 fan a completely different size?

Contacted the seller but still waiting for an answer...


Thanks
 
Yes it will be too rich a mixture causing it too soot up,are your combustion air inlet and exhaust clear,are you using the correct fuel pump,not familiar with eberspacher codes as I have the Chinese heater 2kw.
 
I repair and service Eberspachers. These Chinese 'spares' seemed like they would be a godsend to keep units working without costing a fortune. I did try some fan motors and complete fan units. Like the OP I had to butcher the part to get it to fit and then found that the fan speeds were different. I have tried through eBay to get items listed as genuine replacements banned but without success. Likewise the pumps which I tested and found they had a completely different dosing rate than eberspachers, some were listed as suitable for ebers AND webasto and these makes have a completely different dosing volume and pump speed GRRRRRR!
On the subject of the fan motors, these are now becoming my biggest spares problem ( it used to be the ECU until Hella came along) I have tried to purchase just the motor but so far without success. I know that someone sourced the bearings and I may have to resort to locating these. My only other source is cannibalising old heaters where the fan housings are damaged or the pipes badly corroded.
 
It seems a shame to headline this post as "Another Eberspacher Problem", as the problem is not with Eberspacher, but with the OP using some cheapo cheap similar part sourced from eBay.
 
NormanS said:
It seems a shame to headline this post as "Another Eberspacher Problem", as the problem is not with Eberspacher, but with the OP using some cheapo cheap similar part sourced from eBay.
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Point taken, I wasn’t intending to slur Eberspachers good name, only wanted to catch the eye of any Eberspacher experts on the forum.
the seller of the fan has replied saying he will refund me if I send the fan back, which I think is good of him. I guess I’m going to have to buy the genuine item.
Thanks for everyone’s help, as always the knowledge out there is outstanding?
 
DavidGrieves said:
Hi pcatteral. Thanks for the info, really useful. Do you know if the D2 fan is the same as the D4 fan or are they physically a different size?
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The D4 is much bigger! Is it a 12 volt one you require? When ECUs were the big problem I had several heaters just missing them, I sold off a load of parts at sensible low prices just to find good homes for them. I will search the shelves for one but as stated the fan is proving to be the weak link now. I understand that new models have brushless fans though I guess the bearings are still an issue.
 
Check the gap between the fan and the burner housing . If too wide, it will not push enough air into the burn chamber. Not enough air = too much fuel = sooting up.
 
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