QUESTION UM2+ print fans not working & on 100% all the time after replacement

[nogindrops 0]

Hi guys

 

Firstly hello to all 🙂

 

Ive been using a pair of UM2+ machines for a around 3 years without any really issues.

 

Yesterday I noticed the fans were not coming on the print head on one of the machines.

I investigated & had 24v at the fan connections at the print head so removed the fans for testing & one of them wouldn't spin when fed with 12v,so ideal dead fan & easy fix is what I thought initially .

 

I proceeded to "Borrow" a fan from the other machine as I needed the one set up for pla to run & when plugged in the fans now are on permanent regardless to what the printer is doing!

 

ive done a reset & still the same unfortunately

 

Any suggestions gratefully received

 

Andy