dantastic Posted March 25, 2019 Share Posted March 25, 2019 This forum has a wealth of knowledge so I figured I'd ask here. I have an old Eberspacher D2 I want to use for a project. I've done a service and it looks really nice and clean. Trying to start the unit the fan spins up for about 2 sec and then everything just shuts down. The only error code logged is '33'. The manual suggests this is a fan speed issue. The fan speed is measured by a magnet. I have taken the fan off the motor and I can see on the back that there has been significant rubbing. There's also an empty hole where a magnet could have been located. So me question is, should there be a magnet mounted to the fan? Or where is the magnet the sensor is using to measure the fan speed? Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted March 25, 2019 Share Posted March 25, 2019 Some very good reading for you. Quote Link to comment Share on other sites More sharing options...
dantastic Posted March 25, 2019 Author Share Posted March 25, 2019 45 minutes ago, daveturnbull said: Some very good reading for you. Airtronic models have a magnet mounted in the impeller for checking the motor rotation speed. https://www.letonkinoisvarnish.co.uk/eberspacher19_big.jpg Yup. I am missing this magnet! Anyone with a spare impeller??? Quote Link to comment Share on other sites More sharing options...
zardos Posted March 25, 2019 Share Posted March 25, 2019 Would it not be easier to buy a small magnet and stick it in? (might not be the right size but for example 10 of https://www.ebay.co.uk/itm/Neodymium-Disc-Magnets-5mm-Dia-x-3mm-Thick-Grade-N50-Small-Strong-Round-Magnet/371176559801 is £2.99 ) Quote Link to comment Share on other sites More sharing options...
dantastic Posted March 25, 2019 Author Share Posted March 25, 2019 Problem is the impeller is a bit damaged where the magnet should sit. I might try if I can't get hold of one Quote Link to comment Share on other sites More sharing options...
supaimpy Posted March 25, 2019 Share Posted March 25, 2019 well the fan is balanced as well as the air gap being set and the magnets are not available seperately , you are really going to need a blower motor, as otherwise you'll struggle to get proper combustion even if by fluke you get the fan speed within tolerance. Quote Link to comment Share on other sites More sharing options...
dantastic Posted March 26, 2019 Author Share Posted March 26, 2019 9 hours ago, supaimpy said: well the fan is balanced as well as the air gap being set and the magnets are not available seperately , you are really going to need a blower motor, as otherwise you'll struggle to get proper combustion even if by fluke you get the fan speed within tolerance. The blower assembly new is two times the price of a full heater install kit from China. I'll take my chances... Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted March 26, 2019 Share Posted March 26, 2019 Slightly cheaper option Quote Link to comment Share on other sites More sharing options...
dantastic Posted March 26, 2019 Author Share Posted March 26, 2019 Alibaba do fans for a tenner. Full blower assemblies for about 30. I'll go through a lot of them before I've paid for a genuine one... Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted March 27, 2019 Share Posted March 27, 2019 I'd rather have a Chinese fan in a German heater than a completely Chinese heater, call me paranoid Quote Link to comment Share on other sites More sharing options...
dantastic Posted March 28, 2019 Author Share Posted March 28, 2019 I got in contact with the guy who runs the site linked to by @daveturnbull above. He suggested the fan was totally repairable using magnets, just like @zardos suggested. So I have magnets bought and a 2 component liquid metal kind of filler bought that I will try to repair the fan with. Failing that I will get a Chinese fan. The German units are working really well but the parts are insanely expensive. If you treat the Chinese heaters as disposable you'd be better off. If if wasn't for the fact that I already own the Eberspacher I would 100% get a Chinese one. Quote Link to comment Share on other sites More sharing options...
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