# Error: Heater extruder not heating at expected rate **URL:** \ **Category:** General Discussion\ **Created:** [June 22, 2024, 9:38am UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223 "2024-06-22T09:38:44Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![ugg](https://avatars.discourse-cdn.com/v4/letter/u/50afbb/32.png) [@ugg](https://klipper.discourse.group/u/ugg)\ **Post date:** [June 22, 2024, 9:38am UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/1 "2024-06-22T09:38:44Z")
### Basic Information: Printer Model: Ender 3 Pro MCU / Printerboard: Bigtreetech skr mini e3 3.0 Host / SBC - PI 4 [klippy (2).log](https://klipper.discourse.group/uploads/short-url/1fFU0d1GCoXyt06E2dmBknwTkmj.log) (489.0 KB) klippy.log _Fill out above information and_ **_in all cases attach your_ `klippy.log` _file_** (use zip to compress it, if too big). _Pasting your_ `printer.cfg` _is **not** needed_ _ **Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there** _ ### Describe your issue: All was working fine with my printer and then when I came to use it the next time I was getting an error in Klipper. Error: Heater extruder not heating at expected rate I have changed the extruder cartridge for a new one but I am still getting the error. I have attached the Klippy Log and if someone could advise what the problem could be that would be most appreciated ![F8IeMOjRYQ](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/b/bb46eb7c8cc85dfa7ae1f87d51b9cd7eade42e45.png) ![wN85JhFFMq](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/1/1311fcc39b19c8e292e1ecbaa4226543f327c61b.png) Thanks in advance Mark ---
**Author:** ![LifeOfBrian](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/lifeofbrian/32/2380_2.png) [@LifeOfBrian](https://klipper.discourse.group/u/LifeOfBrian)\ **Post date:** [June 22, 2024, 10:46am UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/2 "2024-06-22T10:46:34Z")
Did you intentionally heat the hotend and bed at the same time? What happens if you only heat one at a time? Does it work then or what raises the error specifically? ---
**Author:** ![ugg](https://avatars.discourse-cdn.com/v4/letter/u/50afbb/32.png) [@ugg](https://klipper.discourse.group/u/ugg)\ **Post date:** [June 22, 2024, 11:02am UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/3 "2024-06-22T11:02:26Z")
@LifeOfBrian I have tested heating the hot end and the bed and I get errors on both. Also tried both at the same time. I also used a multimeter to check if any voltage was going to the appropriate connectors on the MB whilst heating and both show zero volts when testing. The main supply to the board shows 24v. They just do not seem to heat anymore. ---
**Author:** ![theophile](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/theophile/32/31_2.png) [@theophile](https://klipper.discourse.group/u/theophile)\ **Post date:** [June 22, 2024, 2:14pm UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/4 "2024-06-22T14:14:50Z")
Sounds like your mosfet may have failed. I’ve had that happen before. You can get dedicated mosfet boards for pretty cheap that you can control with any of the other pwm-capable pins on the board. ---
**Author:** ![LifeOfBrian](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/lifeofbrian/32/2380_2.png) [@LifeOfBrian](https://klipper.discourse.group/u/LifeOfBrian)\ **Post date:** [June 22, 2024, 3:03pm UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/5 "2024-06-22T15:03:40Z")
Just to be sure: you specified the right pins for the heaters? It is not impossible but rather rate that two mosfets die at the same time. ---
**Author:** ![ugg](https://avatars.discourse-cdn.com/v4/letter/u/50afbb/32.png) [@ugg](https://klipper.discourse.group/u/ugg)\ **Post date:** [June 22, 2024, 3:36pm UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/6 "2024-06-22T15:36:46Z")
@LifeOfBrian Everything was working fine but here are the settings for the extruder and Bed: ```auto [extruder] max_extrude_only_distance: 100 step_pin: PB3 dir_pin: !PB4 enable_pin: !PD1 microsteps: 16 rotation_distance: 34.406 nozzle_diameter: 0.400 filament_diameter: 1.750 heater_pin: PC8 sensor_type: EPCOS 100K B57560G104F sensor_pin: PA0 #control: pid # tuned for stock hardware with 200 degree Celsius target #pid_Kp: 21.527 #pid_Ki: 1.063 #pid_Kd: 108.982 min_temp: 0 max_temp: 270 [heater_bed] heater_pin: PC9 sensor_type: EPCOS 100K B57560G104F sensor_pin: PC4 #control: pid # tuned for stock hardware with 50 degree Celsius target #pid_Kp: 54.027 #pid_Ki: 0.770 #pid_Kd: 948.182 min_temp: 0 max_temp: 130 ``` ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [June 22, 2024, 4:23pm UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/7 "2024-06-22T16:23:52Z")
Could you please use `Preformatted Text` for your code snippets? Things look much better then and more easy to read. ![Format](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/6/643ab9def96b03089cfb0c194628129fcc96b3f8.png) ---
**Author:** ![ugg](https://avatars.discourse-cdn.com/v4/letter/u/50afbb/32.png) [@ugg](https://klipper.discourse.group/u/ugg)\ **Post date:** [June 22, 2024, 4:37pm UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/8 "2024-06-22T16:37:46Z")
@EddyMI3D updated ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [August 21, 2024, 4:38pm UTC](https://klipper.discourse.group/t/error-heater-extruder-not-heating-at-expected-rate/17223/9 "2024-08-21T16:38:39Z")
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