I have a problem with the internal fan . it makes very loud noise when started cold - after some time it sounds narmal again.
I've tried to oil it but it's very hard to get to the 'bearings" behind the fan-wheel.
Have you found a solution ?
You should get to it behind the lable on the other side.
But most reliable would be a new fan.
There is nothing under that label !
A new fan - yeah, but they are too low quality I think - they should have BALL-bearings
What kind of fan is that?
Look at the specs on the label on the existing fan and find a ball bearing unit at someplace like Mouser electronics or Digikey with similar specs. If necessary, you can cut the connector off the old one with some.of the wire attached and splice it on to the new fan if you cant find one with a connector that is the same
It's an internal fan for cooling the electronics - it's a Hell of a job to get into it.
It looks like the fan for cooling the extruded filament.
Today I just "squirted" a shot af WD40 via the thin straw on the wd40 can through the opening where the leads go into the fan housing - just a shot blow ... and I worked !
I beleave it will give me a lot of hours yet to use this fan 
2 Likes
Good luck with that.
The WD in WD-40 stands for water displacement.
I use WD-40 for a LOT of things, but not as a reliable lubricant for low power moving parts.
WD-40 absolutly will 'gum' up and the fan will fail.
The fan is quiet now because the WD-40 is filling the area where a real bearing should be.
You can buy a 6 back of cheap fans for the price of a small can of WD-40.
Or you can buy a 2 pack of sealed bearing fans.
Whatever makes you happy, and yes I too am a penny pincher.
1 Like
I've looked for some fans with BALL-bearings but couldn't find some.
Do you have a link ?
Double check - but the control box (motherboard) fan should be 12V 50x50x10. Aka a 12V 5010 fan.
Not the cheapest out there, but for high quality I would recommend TH3D parts. I've not had a fan from them fail yet and its been years in service.
This is not a ball bearing but uses a sealed mag-lev bearing:
Google AI states: "Sealed mag-lev (magnetic levitation) bearings and ball bearings are two distinct bearing technologies often compared in high-performance cooling fans and electric motor applications. Sealed mag-lev bearings offer superior lifespan, lower noise, and less maintenance due to the absence of physical contact, while ball bearings provide better reliability under high thermal stress and heavy loads."
Also search amazon for "5010 fan ball bearing 12V"
1 Like
THX but they are way to big for the printer !
I may have found some with ball bearings myself 