Hey guys' i've hade an ender 3 for about two months now and i haven't had any problems until the other day ago i started a print and it was doing good until about about a minuet in it stopped and started beeping and giving me a warning that i needed to replace the thermistor so i ordered a new one from the creality website so when i got i watched a youtube video to make sure i was doing everything right after i got it hooked up i printed something it printed fine  with no annoying beeping i had the temperature set to 200 c but the temperature of the nozzle  was slowly going down until it hit about 182 and then made its way back up by the end of the print does anybody have any suggestions on what the problem might be or how to fix it if so  i would be ever so thankful