"Cold spot" on my heated bed?

[ciutateivissa]

Maybe it is the heat bed temperatures I'm using. When printing with ABS, do we use 90 or higher for the heated bed?
OME

The heat temperature could even be higher, at last for the first three or four layers. I´m using 105° C for the first three layers, then reducing temperature to 96° C. It is quite important to get a consitant temperature over the whole heat bed so let the heat bed work at least for 10 to 15 min before your printing on it.

The fan is the same size as the one supplied with the printer.
OME

Ok, I understand. But maybe the new cooler is more effective (more rotations per min). I´m pretty sure that a smaller one would work much better, just give it a try... Disable the big one and use a 25 o 30 mm fan just for testing, you could just fix it with a tape, just to see what´s happening.

The fan schould just cool the tube of your hotend, not the nozzle itself.