Selfttest error: Please check/ Not connected - Heater/Thermistor
 
Notifications
Clear all

Selfttest error: Please check/ Not connected - Heater/Thermistor  

  RSS
rakhmetov
(@rakhmetov)
New Member
Selfttest error: Please check/ Not connected - Heater/Thermistor

Hi there, 

I've assembled my new MK3S+ kit and can't get past the 'Heter/Thermistor' error during the selftest. It keeps failing while attempting to warm up the heat bed. 

What did I try so far? 

  • Used a hair dryer on the bed and extruder while the printer was on -> The LCD screen displays a rise in temperature for both.
    • I assume this means that both thermistors work correctly. Could anyone confirm? There isn't anything else that would react to temp changes except for thermistors(and display it on the LCD screen :thinking:) ?? 

I followed this guide https://help.prusa3d.com/article/multimeter-usage_2117 .

  • the Einsy heat bed power shows zero voltage (measured against the screws on Einsy board, the two most to the right),
  • the 2 PSU power connections display 23-24ish voltage. 

So, being a complete electronics noob, it looks like there is no voltage to the heat bead at all. I'm stuck now as how to proceed and troubleshoot. Do I need a new Einsy board, change the screws, fiddle with the cables? Does anyone have tips for me? 

Posted : 02/10/2022 5:59 pm
JoanTabb
(@joantabb)
Moderator
RE: Selfttest error: Please check/ Not connected - Heater/Thermistor

have you checked the three fuses?
regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 02/10/2022 6:17 pm
rakhmetov
(@rakhmetov)
New Member
Topic starter answered:
RE: Selfttest error: Please check/ Not connected - Heater/Thermistor

Hey

I've tested all three fuses for continuity. All seem to work. 

Posted : 03/10/2022 6:12 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Selfttest error: Please check/ Not connected - Heater/Thermistor

I would report this to Prusa! Just log in with your Prusa account and select the eshop. After a few seconds the chat window should appear on the lower right corner. If the chat window does not open, disable a possibly activated adblocker or try another browser.

wbr,

Karl

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.

Posted : 03/10/2022 9:22 pm
rakhmetov
(@rakhmetov)
New Member
Topic starter answered:
RE: Selfttest error: Please check/ Not connected - Heater/Thermistor

Hey,

Thanks, will try to clarify with support directly. thx for help!

Posted : 04/10/2022 2:29 pm
SoCalSteve
(@socalsteve)
New Member
RE:

I had the same issue. Getting a new thermistor.

Posted : 17/10/2022 9:54 am
Share: