As subject states, my heater doesn’t heat up.
I have measured the connections to the heater and the soldering points beneath, and nothing shows.
When I turn heater on a red led lights up on mainboard.
I have measured outgoing voltage and it’s 15V. (From power supply)
All the other things seems to work, such as stepper motors and fans etc.
Any suggestions? And how can I pursuit this to find out what is wrong?
Best regards
Micke
Does the red LED on the heater PCB (behind the PEEK tube) light up?
I would check the wiring the heater goes to the first 2 connectors the thermistor goes to the middle connectors.
No, they don’t.
And as checking the wiring, it’s all good.
I suspect the mainboard, if that’s the case I wonder if anyone knows where I can buy one in Sweden. Velleman store doesn’t ship to Sweden?
Problem found and solved 
Problem:
(Mine) Solution:
Now everything works just great again!