Having a bit of an issue, I'm a newbie to the print side of things but have been working within the 3d arena for quite some time. I purchased the Ender-3 S1 Pro just over a week ago , love it! Successfully created and printed some of my own models. But!!!! 3 days later my extruder got jammed in a major way, resolved the jam and alll good untill the second print.... first one was a quick benchtest/rabbit, printed perfectly, then second at around 5% the filliment in the upper extruder became soft and started to jam again..... ( printing was stopped immediately)... I sourced the issue to the Hot end fan not working/or not switching on..... tested the fan and it appears to be faulty... Fillament cooling fan works..... Is there anyone out there that has had similar issues and how to resolve? I have purchased a new extruder ...but I believe I could get this one working again with a new fan..... although there is a possiblity that the main board may not be switching on the terminal ( I tested the fan by switching to the fan terminal that was working... and via manual control turning cooling on,,, the hot end fan did not turn on, therefore I believe that it's Kaput:)... Any insight would be greatly apreciated.