# SV07 plus Error: heater extruder not heating at expected rate 2

**URL:** <https://forum.sovol3d.com/t/sv07-plus-error-heater-extruder-not-heating-at-expected-rate-2/8676>\
**Category:** Sovol SV07 Plus\
**Tags:** heat-fails\
**Created:** [September 7, 2025, 2:03am UTC](https://forum.sovol3d.com/t/sv07-plus-error-heater-extruder-not-heating-at-expected-rate-2/8676 "2025-09-07T02:03:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![nathan](https://avatars.discourse-cdn.com/v4/letter/n/c5a1d2/32.png) [@nathan](https://forum.sovol3d.com/u/nathan)\
**Post date:** [September 7, 2025, 2:03am UTC](https://forum.sovol3d.com/t/sv07-plus-error-heater-extruder-not-heating-at-expected-rate-2/8676/1 "2025-09-07T02:03:30Z")

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Hi

After using my printer for about 10 months, I ran into an issue with the error heater extruder not heating at expected rate. The issue started like a month ago and has been getting worse recently. Now I’m not able to finish my first layer before it triggering.

I’m using orca slicer with the printer, and every time I ran into this issue, I see that the nozzle temp had glitch out for a brief period and dropped to zero. I am suspecting that I either have a bad nozzle thermistor or bad connections with the wires. I have taken the shroud off the toolhead and checked all of the wire connections there, but they all feel snug.

How should I debug or resolve this issue?

Thanks in advance!

edit: put 2 in title as there was another post with the same title with no answer

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**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\
**Post date:** [September 7, 2025, 8:49pm UTC](https://forum.sovol3d.com/t/sv07-plus-error-heater-extruder-not-heating-at-expected-rate-2/8676/2 "2025-09-07T20:49:22Z")

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Most likely issue is a bad thermistor.

Set your printer to preheat ABS and watch the temperature graphs. Spikes low are “open circuit”, spikes high are a “shorted thermistor”.

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**Author:** ![nathan](https://avatars.discourse-cdn.com/v4/letter/n/c5a1d2/32.png) [@nathan](https://forum.sovol3d.com/u/nathan)\
**Post date:** [September 8, 2025, 3:20pm UTC](https://forum.sovol3d.com/t/sv07-plus-error-heater-extruder-not-heating-at-expected-rate-2/8676/3 "2025-09-08T15:20:17Z")

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I remember it spiking low, so I should change the thermistor? What is the model of the thermistor and where should I buy it (USA)?

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<div class="post-metadata">

**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\
**Post date:** [September 8, 2025, 3:47pm UTC](https://forum.sovol3d.com/t/sv07-plus-error-heater-extruder-not-heating-at-expected-rate-2/8676/4 "2025-09-08T15:47:32Z")

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The thermistor itself is generic. The plug and wire length are more specific.

Sovol doesn’t sell the thermistor separately. The complete heat block is available at Sovol’s Amazon store.

> **[Amazon.com: Sovol SV06 Plus Hotend Kit Coming with Brass Nozzle Heating Block...](https://www.amazon.com/Sovol-Hotend-Heating-Thermistor-Silicone/dp/B0C2YX4V7R)**
>
> /

If you are willing to splice wires these are available

> **[Amazon.com: DMiotech 10 Pack 3590B 10K NTC Thermistor Probe, Extruder Filament...](https://www.amazon.com/DMiotech-Thermistor-Extruder-Filament-Sensitive/dp/B0B59K3DP3)**
>
> APPLICATION: Widely used in 3D Printer filament, 3d printing heat bed kits, 3D printer DIY extrusion head accessories, nozzle heating block accessories, throat thermistor heating rod.ADVANTAGES:The temperature sensor, with a precise design, quick...