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If your machine is overheating, there could be a few causes.
Your room may just be too warm.
There is a recommended temperature range for your Glowforge, find out more here:
Your airflow may be insufficient.
If your airflow is blocked for any reason, this can lead to overheat errors. There are several ways this could happen:
1. Your filter cartridge might be clogged.
In you’re using a filter, your filter cartridge may need to be replaced. For more information see this guide. It’s written for the performance filter but the info is also relevant for the personal filter that is sold with the Aura and Spark:
One way to be sure that the filter is not an issue would be to vent directly outside. If it’s at all possible venting outside is preferred — It doesn’t have the cost of the filter cartridges and in general you get better airflow and thus better performance.
2. Your exhaust fan may need to be cleaned
Debris and residue can accumulate in your exhaust fan which can cause it to be less efficient. For more about cleaning the fan:
https://support.glowforge.com/hc/en-us/sections/11792691970075-Cleaning
3. Your exhaust hose may be obstructed
In general, there are guidelines about how to set up your exhaust hose for best results. Here’s the official guidance:
Other issues
If you have an Aura or a Spark there have been some reports of people who have solved overheating issues by cleaning their laser head thoroughly, it appears that residue had covered up the temperature sensor. This has not been officially confirmed by Glowforge, but it’s something that has been mentioned on the forum or Discord. Glowforge’s official documentation on cleaning the Aura head is here:
Your air intake may be blocked/other miscellaneous possible causes. Your Glowforge pulls air in from the room, and you need to be sure that the intake isn’t blocked. You can find out more about that and other possibilities here:
Good luck and stay cool!