Hi, I damaged my printer with an ABS print gone horribly wrong (unattended) 2 (the side fans) of 3 fans on print head are spinning when I control fan speed from the maintenance menu, should the third rear nozzle fan be spinning when I do this - or does it mean it is dead. I killed the heater cartridge trying to remove the ABS disaster too, so I can't try get it hot to do a test print to see if the third one comes on. Any ideas much appreciated. I've found a replacement for this tiny 3rd fan on eBay but I just want to check with the community before I click purchase. Thanks!