Echo: Heating failed
This is the first time I have hooked up my mini Kossel to my computer this is a brand-new build and meet your message I get is " Echo: Heating failed" is there anyone that can help me with this problem?
Looks like marlin, right?
Not a marlin expert, but it means you told it to heat and it didn't work. Probably the thermistr or heater are connected on wrong pins with respect to your configuration.