My printer keeps saying paper jam but there is no paper stuck inside. I've opened every door and checked everywhere.
This ghost paper jam error is caused by small bits of torn paper, dust on the sensors, or worn rollers that are not gripping properly. Open the printer fully and use a flashlight to look deep inside — even a tiny piece of paper the size of a fingernail can trigger the sensor. Check the rear access panel if your printer has one, as paper often tears and gets caught there. Next, clean the pickup rollers with a lint-free cloth dampened with distilled water. These are the small rubber wheels that pull paper in — if they are dusty or smooth from wear, the printer thinks paper is jammed because it cannot feel the paper feeding correctly. Also check that you are using the right paper size and that the paper guides in the tray are snug against the paper stack. If the rollers look worn or shiny, they may need replacement — you can order replacement roller kits for most major printer brands for about $15 to $25 online.
