Hmmm. way too cold. 170 is the quoted extrusion temp of most PLAs I have used. Perhaps my current 100K epcos thermister is out, but If I try to extrude at 170 degrees with the new setup, the extruder skips steps and also slips on the filament, eventually the extruder becomes blocked. If your extruder is hot enough AND the extuder is ROUGHLY aligned right (it doesnt need to be perfect), it should have no problem pushing through filament. To measure, I just taped (using kapton) my thermocouple to the brass part of the hotendand ran it through a filament load process. Mine got to roughly 210 degrees before it started pulling through filament.
I wish I took some pictures of this before I tore apart the existing setup. Sorry about that. Regardless my factory setup worked fine with ANY
**** filament I would use. But the temp of mine measured 210 with PLA. Knowing 3D printers and their components, I wouldnt be suprised if your printer runs cooler than mine. If I take 3 thermisters and 3 heater cartridges - all of the same type, there is definitely considerable variation between them if used in the same setup. These electronics are not accurate unless they have been calibrated. Perhaps yours wasn't before it left the factory.
Saying all this, PLA melts and extrudes OK at 170 - just not as nearly as well as PLA at 210. In my experience.
I believe temperature settings are stored in the .cube file anyway. Looking at some of the recent posts, it appears you may be able to compensate for your particular setup by increasing the temp in your sliced files.