Quote Originally Posted by wirlybird View Post
QIDI TEch-1 extruder temp issue. My printer seems to have developed an issue maintaining the extruder temp. Say I set it at 200 for a print. It heats ok but a little while after the print has started the temp registers as much as 15 degrees less. S3D and the printer display both agree. After a long time, let's say 20 minutes into the hour and a half print the temp slowly starts to inch up. Over the 90 minutes the temp is barely able to get back to the target temp.

Any ideas?
I had this problem when the big side fan was on. Once the unused extruder reaches 50°, there are three fans running and the extruder you're using has a hard time maintaining its temperature. Making sure that side fan is off, if you haven't already, should be your first step. I disconnected the cable to make absolutely sure.