Thany you, I'm take the oportunite to ask help, on priting.
The problem happened when I started to print and after the 4-10 th layers I didn’t have plastic getting out from the nozzle.
At first time, I thought problem with the nozzle.
So I replaced the nozzle and throat and started to print again.
After while same problem.
So I thought poor quality of the troat, so a replace again the nozzle and troat, because a saw that plastic melted inside the troad with teflon.
On third try, the same problem.
So I read more on internet, and someone with same problem, adviced to see if speed cooler's fan?
They were saying same times old fan lost speed and this can be a problem, keeping low temperature at cold zone.