What safety precautions should I take when dealing with a fuser related error like 'cp3525 59.fo error'?

When dealing with fuser-related errors such as 'cp3525 59.fo error', safety is paramount. Always ensure the printer is turned off and unplugged from the power source. Allow the printer, especially the fuser unit, to cool down completely for at least 30-60 minutes before attempting any internal inspection or component replacement, as fusers can reach very high temperatures.