Welcome to the SeeMeCNC Community

I, like many people, have been suffering from the dreaded "DEF" temperature display.

Initially, it was problems with the temperature of my printer (cold Michigan winter days), or problems with the cable coming lose from the hotend. I built an enclosure and printed out the whipclip.

However, I am now experiencing more frequent issues when I print longer jobs (something more than a simple test). The hotend and bed will turn off heat with the dreaded "DEF" for the temperature display, but will not tell the printer show it continues for hours attempting to print even after the printer will no longer extrude.

I have seen many posts here and on Facebook. However, I have not seen all of the troubleshooting suggestions put together. Has someone already done this and put together a troubleshooting guide to "DEF"?

If so, I would love to have the link. Otherwise, I will need to spend a couple of hours compiling something. I figure I probably have a couple of hours going through trying to figure out what is wrong.

I wish someone would have told me how problematic 3D printing was before I purchased my printer.

Thanks for any and all the help everyone provides!!

TruckerGeek wrote:
I wish someone would have told me how problematic 3D printing was before I purchased my printer.

Thanks for any and all the help everyone provides!!

You probably wouldn't have listened to them, just like the rest of us!

I experienced the DEF error by tightening the Thermistor wires down too tightly and pinching the wires between the washer and the heat block. Not sure if you already checked for this, but it could explain why your problems occur with longer jobs (with heat expansion in the mix).

Mac The Knife wrote:You probably wouldn't have listened to them, just like the rest of us!

Sadly, you are almost certainly right. Ok, not almost, you are 100% correct!