Extruder won't reach desired temp
I am using Anet A8 printer and everything seems to be set up correctly. I have good connections, etc. but the extruder won't reach the desired temp. Example: I set temp for 210... it will heat to about 207 and then idle. The temp varies between 2 and 4 degrees below the desired temp. This causes the print to never start. Can I set up a range that the printer will start? How can I fix this problem? Thanks.