MINTEMP Error & Heater/Thermistor Error on Bed Selftest
 
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MINTEMP Error & Heater/Thermistor Error on Bed Selftest  

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juli0r
(@juli0r)
New Member
MINTEMP Error & Heater/Thermistor Error on Bed Selftest

Hi!

I have my MK3S for quite a while, but never got around to repairing it after I got an extruder blob and removed it. So it stood around unused for over a year.

Now I got some time again and tried, but despite already having exchanged both thermistors (hotend and heatbed) it still says there is a Heater / Thermistor Error and after a restart it shows the "MINTEMP" error (not mintemp bed).

The display consistently shows 0/0° ~21/0° as if it doesn't have any temp information at all except for the environment temp. At least I assume the second row first value is the env. temp.

I am a bit at a loss about what to do. As I said - I already replaced both thermistors. Any help/suggestions?

This topic was modified 12 months ago by juli0r
Posted : 17/03/2023 8:48 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: MINTEMP Error & Heater/Thermistor Error on Bed Selftest

if you are a handy person, you could consider fabricating a test resistor, that you could connect to one of the thermistor inputs. 
If you use a 100 K Ohm resistor, the display should show approximately 25C.


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 : 17/03/2023 9:57 pm
juli0r
(@juli0r)
New Member
Topic starter answered:
RE:

Thanks for the answer.

Not really a handy person, but I could give it a try.

What would that tell me though? I guess if it shows a temperature with resistance built in the board works correctly and the failure happens somewhere else and if not it's probably the board that's the problem. Is that right?

Posted : 18/03/2023 5:14 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: MINTEMP Error & Heater/Thermistor Error on Bed Selftest

That is correct. 

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 : 18/03/2023 6:04 pm
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