I have a large assortment of PLA from many different manufacturers. So far I've never found one which prints correctly at low temperatures. I get poor layer adhesion if the temperature is too low. Try 235*C, and see if it helps. Did you lubricate the hot end with corn oil? Some people call it seasoning. I was having intermittent issues with filament jams, and it turned out to be a broken wire on the extruder fan (the fan cooling the heatsink). I replaced the fan, and it solved the problem (plus it sounds much quieter).