Help: Self-Test Error - Heater/Thermistor Not Connected
RE: Help: Self-Test Error - Heater/Thermistor Not Connected
The thermistor should measure a resistance about 100k at room temperature using a multi-meter. It can be difficult to find the exact spot on the wire where the break is, but bending it and constantly measuring with multi-meter is the easiest way.
It can be soldered again, but no guaranty that it won't break again. You can get a replacement from Prusa Shop.
Have a look at my models on Printables.com 😉
RE: Help: Self-Test Error - Heater/Thermistor Not Connected
I think I'll order the replacement for peace of mind... thanks for the help!
RE: Help: Self-Test Error - Heater/Thermistor Not Connected
Thanks for raising this issue, before me. I started with a PREHEAT ERROR and ruled out the thermistor with a hair dryer, as the LCD responded. I then swapped out the entire HOT END assemble with some new parts, as it was not possible to removed the button headed screw holding the heating element in place. After re-assemble with the new parts, I did a firmware upgrade as this may afford better diagnostics, from 3.11 to 3.13.2 and when running the calibration wizard this results in the error
Self-Test Error - Heater/Thermistor Not Connected
when running a preheat for PLA the heater does reach consistently 111 deg cel before the PREHEAT ERROR returns
I did note that if the heating block is twisted about 35 deg off its correct angle that the Preheat error consistently appears a little earlier at 108 deg cel
the heat bed has no problem reaching the 60deg needed.
This is not a newly built PRUSA , and was working fine prior to this,
I was recently moved to a lab, where the night temperature does dip to 10 degs maybe cooler at night.
I expect PRUSA is safer when turned off in when in a space cooler than 15 degs cel
The only item I can think would cause this error would be if the heating element was not receiving full power
did I read some where that this can be 15 amps at 12 volts, I need to read up to see if this is something I can test with a multimeter
as all I normally do with a multimeter is test resistance,........
RE: Help: Self-Test Error - Heater/Thermistor Not Connected
same issue,
i upgraded at last firmware and prusaslicer and my Mk3s start to have problem, thermal error, and calibration error.
roll back on 3.10 firmware and no more error