I had just installed a room temperature replacement machine, so I’m guessing that’s not for me 
plus, it was operating first then stopping part way through. timer on app was still going, but no head movement and no laser. Just exhaust running and lights, like it ran out of commands to run. it was acting even stranger before that. wouldn’t move to calibrate itself, and other odd phenomenon
Oh I should Note… I am able to see it connect and disconnect from the network.
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Same thing is happening to me right now: device Offline and setting up Wifi again reports device error.
@Slacker has your issue resolved itself also?
You want a teal (same colour as the GF logo) button for Wifi setup. You get that by holding the button for 10 seconds after the machine has powered up. You get the purple button if you hold it down during power up.
I just powered mine up this AM (now) and everything is working for me.
All of them do that. If the machine is too hot it pauses but the timer does not I hope @dan will see to that as it should be easy.
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This is a Pro, operating for about 20 seconds, doing a basic engrave (ruler). Doesn’t even make it to the cut part of the ruler.
It’s a replacement machine, don’t know if it’s brand new or referbished. I’ll wait to hear back from customer service
The top temp to work is very low , so if the room is 81-degrees it can overheat easily and need time to cool down. Engraves can be bad about this as the laser is firing a lot over a short time. This is the nature of the laser and designed so overheating will not damage the machine. If you add a filter capable of over 200 cfm this will pull more air through the machine but only help some at the higher temps.
They don’t have refurbished units. All units going out are newly manufactured including warranty replacements according to @dan.
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As of last night I see been down. I even shifted the GF over to a 2nd Access point (configured and setup on top of the GF) and back to the normal one.
I had some friend over on sunday that I wanted a few things cut before they got there but that didnt happen.
this is not the 1st time I have issues getting the GF started. almost like the PSU is struggling to get things moving (working in the IT side of things i seen systems struggle when the powering on the Amp draw is more than the PSU can handle at once.
I think you’re missing key info here: I was make a frickin ruler, which means in was pulsing the tick marks not the Mona Lisa, it’s a pro which means it has additional cooling and longer duty cycle, it was 60F in the room and I operated my original pro at higher ambient temps this last summer.
This is not my first Glowforge, been at this a while gents.
And this is a warranty replacement, so they can and have replaced those with factory replaired units (refurbished) which I’m ok with as long as it works longer than 20 seconds.
Still waiting for support to help.
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I’m hesitant to reply, at the risk of being promptly dismissed due to it not being your first rodeo. If it was 60 degrees ambient - had it been any colder prior to that? The min operating temp is a 60 degree recommendation. Perhaps your unit and coolant hadn’t warmed to ambient room temps.
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I think the answer is above.
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GF does caution users to disconnect the exhaust when the printer isn’t running, specifically for this type of reason.
But disconnecting the duct is a PITA if your vent is permanently installed. I got a magnetic dryer vent connector off Amazon that works pretty good. But I also got an in-line duct fan that’s positioned at the end of the duct nearest the discharge vent. If I leave that running at low speed even with the GF shut off, it is always pulling indoor air through the machine, nothing can come back from outside. (it also helped immensely with ventilation. I can cut wood and acrylic now and not even get the slightest whiff of anything stinky).
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This is the one I made with the Glowforge and a couple cheap parts from the hardware store: Draft dodger
Has been working great this winter!
even though none of my other devices were having connectivity issues I finally broke-down and restarted all networking throughout the house and after that the GF sprung back to life!
@Slacker sounds like you might have something else going on 
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I had the same issue yesterday of showing offline, even after calibration. I gave up on it because what I wanted do do wasn’t important. I later discovered that the tv wasn’t connecting to WiFi either, and restarted the router. I didn’t think to go check the GF, but that was probably the issue.
Having been at this rodeo for awhile, how do you know your replacement was a factory repaired (refurbished) unit? @dan said they were not doing that so interested when that might have changed and how you know.
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Thanks for reaching out. I’m sorry your Glowforge was having trouble getting online.
I extracted the logs for your unit and didn’t see anything unusual. However, if you run into this issue again, please let me know. I’m happy to look into it for you.
We try to keep to one topic per post in the Problems and Support section. If anyone else is still experiencing problems, please create a new topic.