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Thermistor issue
#1
I have a DaVinci 1.0 running Repeiter .92 and an E3D v6 hot end for over a year now with no issues.  A couple of days ago I turned on the printer and noticed when it first boots the temp on the hotend was showing  -20 and then within a few seconds DEF .  Even though the thermistor was reading correctly at 100 I ordered a new one.  The new one has the same issue.  I have taken every thing apart and my multi meter shows continuity all the way back to the motherboard and I can also read 100 there as well.

Does anyone have any suggestions?  Is there a way to test the motherboard?

Thank you
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#2
As a test you could swap the bed and extruder thermistor wires. And/or perhaps you could connect a 100K ohm resistor in place of the thermistor. Doing that at the actual thermistor and then at the motherboard would at least help to isolate the problem.
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#3
Hi Medfoch. Did you get this figured out? My thermistor is working correctly as well but I'm getting nothing showing on the RH software.
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