@cdk Here is what I would do.
Turn on the Log in MC and post that. or check it yourself. It records the commands sent and the temperature read. So for example if you set the temp to 215 and you get reports back liker 180, 210,193,222, 175..... Then you got a bad contact either the cartridge is not mounted properly (grub screw too loose) or there is a break in the thermistor wire. If the temperature is somewhat steady then but too low (like 205,205,206,208, 206. Then either the fan shroud is pointing on the block/nozzle (fan shroud on the pulse is terrible especially at bigger items at lower layers too much fan power gets deflected off the bed/print back on the nozzle. You can test that by turning the fan off. It could also be that it needs to be PID tuned (MC has a page on this somewhere) Also make sure the heater cartridge wire has no kinks and breaks and make sure there is no "wiggle" on where the thermistor and heater are plugged in the board (On my pulse they did a crappy job on strain relief and the MB case looked like a birds nest) And then check the Voltage on the board. if its less than 11.7V then you got a power supply problem. Mine came with a 15A PSU and that is not enough for this machine in many cases. Also make sure you got a good "sock" on your heaterblock. The machine was tuned and is designed to run the hotend with a sock
HTH
