Receiving error "MCU 'mcu' shutdown: ADC out of range " just when running pressure advance test

General Discussion
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Basic Information:

SV06+ :
SKR3 EZ:
Raspberry PI 5
klippy.zip (1.1 MB)

klippy.log

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Describe your issue:

I am receiving the error mentioned in the title "“MCU ‘mcu’ shutdown: ADC out of range Sensor ‘heater_bed’ temperature -53.134 not in range 0.000:110.300 This generally occurs when a heater temperature exceeds its configured min_temp or max_temp.” "

However, I only get this error in one specific scenario. I am trying to run the Klipper Pressure Advance test, and per the documentation I downloaded the file, set the Prusaslicer settings. and then run the two gcode commands "SET_VELOCITY_LIMIT SQUARE_CORNER_VELOCITY=1 ACCEL=500 " and “TUNING_TOWER COMMAND=SET_PRESSURE_ADVANCE PARAMETER=ADVANCE START=0 FACTOR=.005”

The bed heats up (or if it’s already hot cools down) to the correct temperature, readings are accurate, then this error. I have no problem printing anything else normally, nor heating the bed to any specified temperature any other time.

Edit: Now it gives the error every time it reaches the correct print temperature. As soon as it does, the temp readings go haywire for a second or two flashing high and low values until it hits a negative number and shutsdown. I had done 3 other prints today and no problem until I ran the pressure advance gcode commands, but I don’t see how that could cause this. However it only happens exactly when it reaches the print temp. If I set the bed to preheat to the same temp, no problem.

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The topic is meant to give a short summary - not to be a complete novel.
Please shorten it!.

Sensor 'heater_bed' temperature -55.629 not in range 0.000:110.300

This is a hardware issue. Check for disconnections/loose contacts. Also take in consideration that the thermistor is broken.

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Unfortunately I came to the same conclusion; the timing was just a red herring. I ran a full PID bed test fine, but the second the wire moves the temps go haywire. It seems the wire from the the thermistor likely has a break in the first few inches coming from the bed, which is a major PITA as it’s rubber sheathed in with the wire for the bed power. I ordered replacement thermistors just in case but the wire itself seems to be the issue.

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