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How to replace a thermistor

Sometimes, you may need to replace a malfunction thermistor that comes free with the heater. These could be some helpful tips:

1) Cut the two small red PTFE sensor wires( usually 22AWG), some Keenovo Digital Controller has them in a white sleeve, cut the white sleeve in this case.
Cut close to the thermistor bulge. Never Try to open the patch/bulge or cut into the heater surface.

2) Connect the new thermistor( NTC100K Thermistor B 3950-1%) to the two red wires. There is no polarity here.

3) Attach the thermistor to the heater surface. High temperature silicone RTV cement is recommended for a permanent installation.


  • Hi Rafael Baez Herrera, Please kindly contact us via email for the custom manufacturing.

  • Hi Leo, It should be easy to buy one from your local hardware store or online electronic shops.

  • Where would be the best place to source the correct thermistor? NTC100K Thermistor B 3950-1%
    Looking to change on the Extraction Column; 18″ × 22″ 750W 120V for 6″ × 24″ Column, w/ Keenovo Digital Controller

  • Good Morning,
    Is it possible To order a heat pad for Ender 2
    My intention is to place her on the warm bed that the Ender 2 brings. Therefore, it would be necessary to take into account the screws that are placed in the vertices of a triangle.

    Rafael Baez Herrera
  • Hi Stephane,

    Yes, we’d be more than happy to make a custom heater pad of 220mm x 220mm for you.
    Please contact us via email for quote and ordering process.

    Thank you!


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