Heater / Thermistor not connected.
Selftest Failed:
Heater / Thermistor not connected.
MK3 Kit
I did a firmware update and can get thru the fans self test but not past the next section.
I've tried unplugging/replugging the cables to no avail.
No fuses are blown.
I'm reading 24v between A+ & A-, and 24v between B+ & B-
No voltage between C+ & C- and it appears that there is continuity between C+ & C-. Is that supposed to be?
I have tested continuity between the two red wires coming from the hot end to the plug and they are fine.
I've also tested continuity between the thermistor and the plug and it's fine as well.
Kinda out of ideas here.
Re: Heater / Thermistor not connected.
I am having this exact same problem at this very moment as well.
Re: Heater / Thermistor not connected.
Disconnect your PP cable and try it again.
That totally fixed my issue!
You should be able to connect the PP cable after it completes successfully.
Re: Heater / Thermistor not connected.
That worked for me. Thanks!
Re: Heater / Thermistor not connected.
PP? Power Panic?
Re: Heater / Thermistor not connected.
PP: Pinda Probe
Re: Heater / Thermistor not connected.
Worked for me too - after I'd needlessly waited for & replaced it with another thermistor from E3D, thinking it really was a problem with the thermistor!
Incidentally, The problem only cropped up just after I'd upgraded the Firmware with the prusa3d_fw_MK3_3_5_1.hex file - Perhaps the Prusa coders could look into this to see if it's a bug in the new FW release...?
Many thanks for the tip though - a lifesaver! 😀
Re: Heater / Thermistor not connected.
Hi,
I am having the same problem but to disconnect the PP (pinda probe) cable didn work for me...
I've checked everything and it seems to be fine, all connections and cables ....
Any ideas? A firmware problem maybe?
I bought the printer in August 2018 and I have assambled it just now.
Re: Heater / Thermistor not connected.
A Google search found the answer when I had this problem. Select pre-heat for PLA, then self-test. It might just be that the ambient temperature is too low before the test routine times out.
Re: Heater / Thermistor not connected.
Thanks a lot manek.d,
Yes, I found the answer in google a few days ago and it was the solution. This helped me:
Hi,
I am posting this here as it seems to be the best place to. I experienced a similar fault on my kit printer shipped on Jan 7th 2019. I could not pass the self test and it would give me the "Heater/Thermistor Not connected" during the self test. I updated to the latest firmware 3.5.1 and after looking over the wiring and checking for continuity still did not work. I decided to do a pre warm up on the heater and bed and both worked and regulated their temperatures. I then went to the calibration wizard and ran the calibration again and it waited for the bed and nozzle to cool down. The self test then worked and I was able to complete calibration. Now let me explain. My shop is in the attached and somewhat heated garage and ambient temperature is around 55 to 60 degrees right now during the winter. Like the post above indicates the timeout threshold is too short if the ambient temperature is too low around the printer. Printer has been running fine ever since. So if you come across this problem perhaps it is too cold where you are storing the printer. Good Luck printing!