MK8 Hot End Extruder Nozzle Kit 0.4mm for 3D Printer,Assembled Extruder Brass Kits 1.75mm,30mm A8 Throat Tubing Aluminum Heater Block for RapRep i3 Anet A2 A8 3D Printer Part Replacement

So, I had a near fire with the previous unit when it mucked up and balled around the hot end, but also managed to push out the heating element to the point that it caused a thermal runaway. I came downstairs just as it started to combust, purely by chance. I took the chance to replace this and do some cleaner rewiring in the split loom and more intentional cable lengths instead of ALL the cable...ever. Very pleased.

I installed it, but had to replace the print nozzle. I prefer the steel ones, they last longer. The unit is pretty well made, better that the OEM. I have only used it a couple times so far, it heats up pretty quickly, and the the temperature sensor seems to be reading correctly. The plug for the temperature sensor was not the right one for my main board. But I made it work by pulling the pins out of the connector and just plugging them into the main board. The way you plug the pins in doesn't seem to matter, or I just got lucky. Kind of tacky but it works.

slight smoke at first heat, smelled of oil. got 10 minutes into first print, thermal runaway. restart printer, now will not heat above 40c and then throws E1 Heating failed

Perfect fit for my Ender 3 Pro

I mangled the wires where they attached to the heater/thermistor on my Anet A8 printer. This did the job (didn't use the extruder parts, just the heater/thermistor). Be aware that if you have one of the older A8's, the plug that goes from the thermistor to the circuit board is a three pin plug. This one is a two pin plug - so a bit of splicing was required.

It was God sent. I have an old printer and did not want to buy a new one. It is working better now than before it broke. this saved me 200 bucks on a new printer. it's worth a try!

Not so good, both the thermistor and the heating unit malfunctioned, shorted, smoked

Good