What are the most common underlying causes for "Error 08" appearing on the HP LaserJet Tank MFP 2606sdw?

The most common underlying causes for Error 08 include a failed fuser heating element, a faulty thermistor (temperature sensor) that isn't accurately reporting the fuser's temperature, a problem with the fuser's power supply, or the fuser unit reaching the end of its operational life. Less commonly, it could be due to a loose connection to the fuser.