# Heater \ not heating at expected rate **URL:** \ **Category:** Knowledge Base\ **Created:** [February 13, 2023, 11:21am UTC](https://klipper.discourse.group/t/heater-name-not-heating-at-expected-rate/6642 "2023-02-13T11:21:17Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\ **Post date:** [February 13, 2023, 11:21am UTC](https://klipper.discourse.group/t/heater-name-not-heating-at-expected-rate/6642/1 "2023-02-13T11:21:17Z")
## Heater \ not heating at expected rate ### Background A heater (typically either extruder or bed) is not able to reach or maintain the target temperature ### Reasons - Often this points to some hardware problems with the heater - Damaged heating cartridge - Damaged cables / connectors that are supplying the heater - Damaged / burned MOSFET on the printer-board - Target temperatures set too high for the given hardware to reach or maintain in due time - Air flow of the layer-cooling fans hitting the nozzle and causing a temperature drop - Too strict settings in the [[verify\_heater]](https://www.klipper3d.org/Config_Reference.html?#verify_heater) section ### Potential solutions - Check the heating hardware, especially the cables and connectors. One might even see burn marks on the connectors (high contact resistance leading to local overheating) - Replace the heating cartridge if found faulty. Often the fault only shows up when hot - Replace the heating cartridge with a more powerful variant or reduce target temperature - Replace the main power supply unit by a more powerful one - Use a silicone sock on the heating block - Do **not** simply relax the `[verify_heater]` settings until the error is gone. Verify / validate above points first or you might not have an error but other hard to diagnose issues.