u/Actualnose

hi yall trying to troubleshoot this problem im having with my CR-10s I just bought, i have a target print temp of 230 for my petg filament and it wont heat up the nozzle to that temp it will sit at 10 degrees below it and it does this for any target temp i put in the control settings and if i change the temp settings on an actual print, i got i to print for the first time the other day and now i am running into this issue. idk if its the heater cartridge and i dont really wanna be cutting up wires if i dont have to to replace it. anybody have any advice on trouble shooting this?