# Thermistor failed main board

**URL:** <https://forum.sovol3d.com/t/thermistor-failed-main-board/1875>\
**Category:** Sovol SV04 IDEX\
**Tags:** extruder-kit, solved, official\
**Created:** [March 3, 2023, 6:31am UTC](https://forum.sovol3d.com/t/thermistor-failed-main-board/1875 "2023-03-03T06:31:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Leeroy](https://avatars.discourse-cdn.com/v4/letter/l/eb9ed0/32.png) [@Leeroy](https://forum.sovol3d.com/u/Leeroy)\
**Post date:** [March 3, 2023, 6:31am UTC](https://forum.sovol3d.com/t/thermistor-failed-main-board/1875/1 "2023-03-03T06:31:23Z")

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hopefully someone can help me out on this one my Phil lament was sticking and not extruding so i pulled it apart but now when i turn on the machine it says Thermistor Error (Max/Min Temp)  
! power cycle required! wrong values from the thermistor failed mainboard or damaged thermistor could be the causes. please check these component  
lol does any one know how to fix this

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**Author:** ![Bjoern](https://avatars.discourse-cdn.com/v4/letter/b/46a35a/32.png) [@Bjoern](https://forum.sovol3d.com/u/Bjoern)\
**Post date:** [March 3, 2023, 1:14pm UTC](https://forum.sovol3d.com/t/thermistor-failed-main-board/1875/2 "2023-03-03T13:14:18Z")

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It is a good idea to check the heating cables and thermistor wires of that extruder you took apart:

- are the cables still in place with electrical contact to heater / thermistor?
- is the insulation of the cables still intact & free of crossovers (short circuits)?
- are the other ends of the cables still plugged in?
- are the cables free of any metal parts (e.g. extruder / blower housing) squeezing them?

If all the above is O.K. then you might want to check the electrical resistance of the thermistor using a multimeter. [It is described here.](https://forum.sovol3d.com/t/adjusting-incorrect-thermistor-values/505/2)

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**Author:** ![Leeroy](https://avatars.discourse-cdn.com/v4/letter/l/eb9ed0/32.png) [@Leeroy](https://forum.sovol3d.com/u/Leeroy)\
**Post date:** [March 3, 2023, 8:03pm UTC](https://forum.sovol3d.com/t/thermistor-failed-main-board/1875/3 "2023-03-03T20:03:02Z")

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Good day Bjorne thanks for the reply I found the problem when I put it all back together I tightened the thermistor screw to tight 🤦🏼The design is not a good one but I found a good fix for the problem it’s on a Ender 3/cr-10 but it’s the same set up take a look I think it’s a great solution to a not so good designe 🍻  
[Ender 3/CR-10 Pinched Thermistor Lead Fix - YouTube](https://youtu.be/VCdHzgB3Dnw)