If you are using magnets to hold down your material it can cause this error. Did you remove the carriage assembly and clean the fan at the rear of the carriage?
I’m so sorry to hear that you’ve hit this snag, but I’m glad that @wilsonpf provided some great instructions for locating and cleaning your Air Assist fan. I appreciate you taking the time to clean the fan.
I’ll close this thread for now, but please don’t hesitate to reach out to us directly at support@glowforge.com in the future if you run into any more trouble. We’re here to help!