> For the complete documentation index, see [llms.txt](https://sean-dearing.gitbook.io/klipper-installation-for-anycubic-vyper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sean-dearing.gitbook.io/klipper-installation-for-anycubic-vyper/configuration-checks/verify-heaters.md).

# Verify Heaters

This section explains how to verify if the <mark style="color:red;">`Extruder`</mark> and <mark style="color:red;">`Heater Bed`</mark> heating functions are working as  expected.

* From the MainsailOS web interface;
  * Enter <mark style="color:red;">`100`</mark> in the <mark style="color:red;">`Extruder`</mark> Target; OR
  * Send a <mark style="color:red;">`SET_HEATER_TEMPERATURE HEATER=extruder TARGET=100`</mark> command in the Console;

![Extruder](https://3358793419-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEUZ4ecqSLgI2D4esAcVS%2Fuploads%2Fif2UlN1Hf1TiKXZjJhYn%2Fheaters1.png?alt=media\&token=f0760c00-4b9d-43be-90a9-4d17e372bfa6)

* After a couple of minutes, your <mark style="color:red;">`Extruder`</mark> should heat up and the graph should start showing the proper temperature (by default the Extruder temperature reading is shown in the chart with a purple line);
* You can verify that the <mark style="color:red;">`Extruder`</mark> has heated up by using an infrared thermometer, or a method of your choice (be careful not to touch with your fingers/hand);

![Extruder Verification](https://3358793419-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEUZ4ecqSLgI2D4esAcVS%2Fuploads%2FBcr2WVmb5yiZPX4ZCUnT%2Fheaters2.png?alt=media\&token=c8686229-5064-4ba8-8afb-11318e28f793)

* Once the <mark style="color:red;">`Extruder`</mark> temperature has been verified, set the Target temperature back to '0';
  * Enter <mark style="color:red;">`0`</mark> in the <mark style="color:red;">Extruder</mark> Target; OR
  * Click on the <mark style="color:red;">`Cooldown`</mark> button (turns both <mark style="color:red;">`Extruder`</mark> and <mark style="color:red;">`Heater Bed`</mark> temperatures off); OR
  * Send a <mark style="color:red;">`SET_HEATER_TEMPERATURE HEATER=extruder TARGET=0`</mark> command in the Console; OR
  * Send a <mark style="color:red;">`TURN_OFF_HEATERS`</mark> command in the Console;

![Turning off the Extruder Temperature](https://3358793419-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEUZ4ecqSLgI2D4esAcVS%2Fuploads%2FENi4c8W98KXeESRXOY9e%2Fheaters3.png?alt=media\&token=bdc81c21-944b-4bca-a021-63f56a1a0cb9)

* From the MainsailOS web interface;
  * Enter <mark style="color:red;">`60`</mark> in the <mark style="color:red;">`Heater Bed`</mark> Target; OR
  * Send a <mark style="color:red;">`SET_HEATER_TEMPERATURE HEATER=heater_bed TARGET=60`</mark> command in the Console;

![Heater Bed](https://3358793419-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEUZ4ecqSLgI2D4esAcVS%2Fuploads%2FRlO8NCiXyXaE7DVymW8t%2Fheaters4.png?alt=media\&token=445e9269-7568-44ed-b893-06f45640eb75)

* After a couple of minutes, your <mark style="color:red;">`Heater Bed`</mark> should heat up and the graph should start showing the proper temperature (by default the <mark style="color:red;">`Heater Bed`</mark> temperature reading is shown in the chart with a blue line);
* You can verify that the <mark style="color:red;">`Heater Bed`</mark> has heated up by using an infrared thermometer, or a method of your choice (you can use your hand here by hovering above the bed, just be careful not to touch it directly);

![Heater Bed Verification](https://3358793419-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEUZ4ecqSLgI2D4esAcVS%2Fuploads%2F2zpFDKNS6DaR4sxzcXci%2Fheaters5.png?alt=media\&token=fcb49fe1-7dc2-420f-b682-5ec0c0781d12)

* Once the <mark style="color:red;">`Heater Bed`</mark> temperature has been verified, set the 'Target' temperature back to '0';
  * Enter <mark style="color:red;">`0`</mark> in the <mark style="color:red;">`Heater Bed`</mark> Target; OR
  * Click on the <mark style="color:red;">`Cooldown`</mark> button (turns both <mark style="color:red;">`Extruder`</mark> and <mark style="color:red;">`Heater Bed`</mark> temperatures off); OR
  * Send a <mark style="color:red;">`SET_HEATER_TEMPERATURE HEATER=heater_bed TARGET=0`</mark> command in the <mark style="color:red;">`Console`</mark>; OR
  * Send a <mark style="color:red;">`TURN_OFF_HEATERS`</mark> command in the <mark style="color:red;">`Console`</mark>;

![Turning Off the Heater Bed Temperature](https://3358793419-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEUZ4ecqSLgI2D4esAcVS%2Fuploads%2FmxmvPyFqJxlx61vEQydd%2Fheaters6.png?alt=media\&token=13abc243-aa93-4bea-a303-1da12fbcf659)

* Once the <mark style="color:red;">`Extruder`</mark> and <mark style="color:red;">`Heater Bed`</mark> temperatures have been tested, leave them at 0 and ensure they come back down to and stay at room temperature. The <mark style="color:red;">`Heater Bed`</mark> will take a bit longer as there is no fan to cool it off.