Enters cool down mode before even starting lasering

So I go to do an inch and right when I hit print it goes immediately into cooldown mode and says your print lotta Macklin resume in a few minutes?

What could be the problem? Anyone

I’m not sure I understand all of what you said, but knowing your model and the ambient temperature in the room where you have it would help us help you narrow it down. :slight_smile:

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That has to be Siri dictation or similar… :rofl:

From what I’m guessing you’re trying to say, the machine might have a problem reading temperature.

One thing to try is - with power off - to carefully re-seat the connection to the laser head. You can also check the connection of the grey ribbon cable to the exposed board on the left side of the machine, down behind the rail.

If there is not a “Cooling down” message in the app, but a yellow button appears and a print is unsuccessful, this could indicate a problem with the connection to the printer head, and the things you pointed out may be worth checking. That doesn’t seem to be the case here, though.

Based on the context @georgebarrows26 provided, along with the information I extracted from the logs of the Glowforge around the time of their post, it looks like the temperature is being read just fine. The “Cooling down” message will appear if the sensors have registered a coolant temperature that is too warm to print. According to our logs, this Glowforge was slightly too warm to print at the time the topic was posted.

@georgebarrows26, Your Glowforge features a closed-loop liquid cooling system that uses the air from the room to remove heat. It is designed to be used when the temperature next to your Glowforge is between 60 degrees Fahrenheit (16 Celsius) and 75 degrees Fahrenheit (24 Celsius). To check, put a room thermometer next to the right hand side of the Glowforge; it draws in air from underneath, on the right.

You can try any of these things to improve warm-weather performance:

  • Try printing with no material on the bed (so as not to generate smoke and fumes) and no exhaust hose attached. If this works, then the problem may be that your exhaust hose is constricting the flow of air out of the unit, preventing cooling.

  • Examine the bottom-right side of your Glowforge, and ensure that there is no fabric or other flexible material underneath it, like a tablecloth. There are air intake vents, and if they become obstructed, it makes cooling less effective.

  • Try pointing a fan at the right side of your Glowforge. If there is warm air around the intake, this could help it cool off.

  • Power off your Glowforge when you are not using it. When your Glowforge sits idle, the fans are off, so heat can build up

  • Just wait. Your print may take a little longer when it’s warm, but your Glowforge will protect itself and make sure it cools enough to prevent any loss of power or damage. It’s clever enough to pick up from exactly where it left off, even if it needs to pause to cool down during the print!

  • Ensure that the sun isn’t shining on the lid. This could cause the inside of your Glowforge to heat up.

  • If you are venting outdoors, ensure that extreme temperatures or humidity do not enter the Glowforge unit through the exhaust hose. Disconnect the hose from the outside air when the Glowforge is not in use.

  • Turn your Glowforge off and open the lid for a few minutes before trying again. It’s possible for the air in your Glowforge to heat up, just like a car in the sun on a hot day, opening the lid will help that warm air to escape and your Glowforge to cool down.

If you are still running into trouble, please let us know the following so that we can investigate further:

  1. A description of the things you tried and what happened

  2. If possible, place a thermometer next to your Glowforge on the right hand side and measure the temperature there; if not, estimate the room temperature

  3. The date and time (including time zone) when you had the problem

  4. Take a picture of the exhaust hose behind your Glowforge that includes the part where it connects to your Glowforge, and the part where it exits the room


What a great response and seems as it may have been a little too hot, my Ambien temperature was probably above 75 so that makes it.

They print outside in one of my garage so it was a little warm.

Thank you for updating us! I’ll close this thread for now, but if you continue to run into the same trouble, working through the instructions my colleague Vee provided would be immensely helpful in narrowing down the snag. You can post another thread, or reach out to us directly at support@glowforge.com if the same error occurs.