<p>I had a similar problem last week where the thermostat's heat shrink was being melted by the block and the two wires were touching. I fixed this by securing the thermistor and putting a thermal insulator between the block and the wires. I also put a small piece of heat shrink between the wires to insulate them so they will never touch. Thank you and I hope this helps.</p>

CC BY-SA 3.0
2017-05-09T22:27:20.493Z
Your answer has a sound foundation in your explanation. If the thermistor is shorting, it would result in an inaccurate reading to the processor. Your solution is also simple enough to implement as a test.
fred_dot_u
CC BY-SA 3.0
2017-05-09T15:41:12.940Z
2017-05-10T15:39:04.920Z
2017-05-10T15:39:04.920Z
Vosem Media
<p>The Anet A8 files that come preloaded are <code>.stl</code> so if you try to print those it will say printing zero percent and then just switch right back to preheating PLA without any error message. Download a free slicer tool if that's the case.</p>

CC BY-SA 4.0
2018-08-12T22:16:17.913Z
mine came with gcode on the sdcard...
Sean Houlihane
CC BY-SA 4.0
2018-08-12T15:44:18.223Z
2018-08-12T21:26:15.337Z
2018-08-12T21:26:15.337Z
joe b
<p>I have just built my Anet A8 and it won't print. </p>

<p>I will preheat it (190°C 60°C) and then press "<code>Print File</code>" and select, then it starts for a second, gets to around 11% and stops and shows "<code>Preheat PLA</code>". The PLA is already preheated - it is coming out of the nozzle. </p>

<p>Any help would be appreciated.</p>

CC BY-SA 3.0
2017-04-26T06:55:47.617Z
What does the "file" you're trying to print look like? How was it generated? Can you post the first few lines (up to and including the first few G1 commands) here?
Tom van der Zanden
CC BY-SA 3.0
2017-04-27T14:42:28.787Z
Make sure the thermistor isn't loose in the extruder block. If  it even "wobbles" in its mount, the reported temperature will go awry.
Carl Witthoft
CC BY-SA 3.0
2017-04-28T10:31:03.257Z
Looks like you have a faulty Arduino or something on the board or nozzle assembly is loose. When the machine stops does it show any message?
electrophile
CC BY-SA 3.0
2017-04-30T01:55:29.153Z
This _may_ be useful, [Print won't start, stuck at 0% forever](http://forums.reprap.org/read.php?406,715111) - in particular the advice regarding the `M190`.
Greenonline
<3d-models><extruder><pla><anet-a8>
Anet A8 won't print
ethan lee
# Anet A8 won't print

(Asked by: username_0 on 2017-04-25)

I have just built my Anet A8 and it won't print.

I will preheat it (190°C 60°C) and then press "`Print File`" and select, then it starts for a second, gets to around 11% and stops and shows "`Preheat PLA`". The PLA is already preheated - it is coming out of the nozzle.

Any help would be appreciated.

**Tags:** 3d-models, extruder, pla, anet-a8

> **Comments:**
> **username_1**: What does the "file" you're trying to print look like? How was it generated? Can you post the first few lines (up to and including the first few G1 commands) here?  
> **username_2**: Make sure the thermistor isn't loose in the extruder block. If  it even "wobbles" in its mount, the reported temperature will go awry.  
> **username_3**: Looks like you have a faulty Arduino or something on the board or nozzle assembly is loose. When the machine stops does it show any message?  
> **username_4**: This _may_ be useful, [Print won't start, stuck at 0% forever](http://forums.reprap.org/read.php?406,715111) - in particular the advice regarding the `M190`.  

---

## 2 answers

### Answer by username_5 on 2017-05-09. Score: 5

I had a similar problem last week where the thermostat's heat shrink was being melted by the block and the two wires were touching. I fixed this by securing the thermistor and putting a thermal insulator between the block and the wires. I also put a small piece of heat shrink between the wires to insulate them so they will never touch. Thank you and I hope this helps.

> **Comments:**
> **username_6**: Your answer has a sound foundation in your explanation. If the thermistor is shorting, it would result in an inaccurate reading to the processor. Your solution is also simple enough to implement as a test.  

---

### Answer by username_7 on 2018-08-12. Score: 0

The Anet A8 files that come preloaded are `.stl` so if you try to print those it will say printing zero percent and then just switch right back to preheating PLA without any error message. Download a free slicer tool if that's the case.

> **Comments:**
> **username_8**: mine came with gcode on the sdcard...  

---

