Why Does My Printer Keep Jamming? Paper Causes & Fixes

Printer with a paper jam caused by a paper-feed problem

The printer whirs, grabs a sheet, and stalls halfway through with the dreaded jam light flashing. It happens again on the next page, and the one after that. The instinct is to blame the machine, but paper condition, storage, loading and printer settings can all contribute to repeated jams.

This guide explains why printers really jam, focusing on the paper-related causes that are both the most common and the easiest to fix. It is part of our notebooks and paper for school guide.

Quick answer

Repeated printer jams can be caused by paper condition, incorrect loading, unsuitable paper settings, overfilled trays, debris or dirty feed rollers. Checking these factors first can help identify simple paper-feed problems before you assume the printer needs repair or replacement.

Why Paper Handling Can Cause Printer Jams

Printer manufacturers identify several paper-feed factors that can contribute to repeated jams, including paper condition, incorrect loading, unsuitable paper, humidity and dirty or worn rollers. A printer that jams repeatedly should therefore be checked for simple paper and feed problems before assuming there is a major hardware fault.

Many basic paper-feed problems can be checked and corrected without replacing the printer, but persistent jams may require professional servicing.

The Most Common Paper-Related Jam Causes

A few causes account for the large majority of paper jams:

Cause	What happens
Overfilled tray	Too many sheets prevent the rollers from gripping and feeding just the top sheet
Curled or damp paper	Moisture-affected sheets feed unevenly or stick together
Paper outside the printer's supported range	Paper that is too light or heavy for the printer can cause feeding problems.
Incorrect loading	Paper guides too loose or too tight cause sheets to feed crooked
Debris in the paper path	Small torn scraps from a previous jam block the next sheet
Dirty feed rollers	Dust and residue reduce the rollers' grip over time

Each of these is addressed in more detail below.

How Humidity and Storage Cause Jams

Paper can absorb moisture from the surrounding air, particularly in humid conditions. In humid conditions, common in many parts of Australia depending on season and location, sheets can pick up enough moisture to curl at the edges or stick together slightly, which disrupts how evenly the rollers feed each page.

Key note: An opened ream exposed to humid air can absorb moisture and become more prone to curling or sticking, so keeping unused paper protected helps maintain consistent feeding.

Simple storage habits prevent most of this:

Keep reams sealed in their original wrapping until you are ready to use them.
Store paper flat rather than on its side, which helps sheets stay uniformly flat.
Avoid storing paper in a garage, laundry or other area prone to damp or temperature swings.
If you buy paper in larger quantities, our guide to bulk copy paper quantities covers storage considerations specific to buying more than you will use immediately.

Seasonal changes in humidity can also explain why a printer that worked reliably for months suddenly starts jamming more often. If jams increase noticeably during a particularly humid stretch of weather, checking how and where the paper has been stored is often more useful than assuming something has changed inside the printer itself.

Paper Weight, Type and Printer Settings

Printers are calibrated for an expected range of paper weight, and feeding paper outside that range increases jam risk. Loading paper that is heavier than the printer's default setting, without adjusting the paper type in the print driver, is a common and easily fixed cause of jams.

A few practical points:

Standard 80gsm paper suits most home and school printers without any setting changes. Our ECOEARTH Recycled Copy Paper A4 80 GSM is a reliable, standard-weight option for everyday printing.
Heavier paper, such as 100gsm, may require a different paper-type setting on some printers. Check the printer manual or print driver for the recommended setting. Our 80gsm vs 100gsm copy paper guide explains when the heavier weight is actually worth using.
Avoid mixing different paper types, sizes or weights in the same tray unless your printer manufacturer specifically allows it. A consistent stack can help the paper feed more predictably.
Very light or very heavy paper outside the printer's supported range can cause persistent jams regardless of how carefully it is loaded. Check your printer's manual for its supported weight range if jams continue despite good quality paper.

Loading Paper Correctly

Correct way to load paper into a printer tray

Correct loading is simple but easy to get wrong in a rush, particularly on a busy school morning when paper gets topped up quickly without much thought. A few extra seconds at this step prevents a jam that would otherwise cost several minutes to clear later.

Check the paper stack before loading. Remove bent or damaged sheets and gently align the edges on a flat surface. Follow your printer manufacturer's instructions for paper preparation.
Square the stack on a flat surface before placing it in the tray, so all edges align.
Adjust the paper guides snugly, not loose and not tight. Guides that are too loose let paper shift and feed crooked. Guides that are too tight can crease the edge of the stack.
Do not overfill the tray. Stay within the fill line marked on most trays, or below the manufacturer's stated maximum sheet count.
Load the stack the correct way up and orientation, since many printers are sensitive to this for double-sided printing in particular.

Rollers and Printer Maintenance

Even with good paper habits, the rollers that grip and feed each sheet wear down and collect dust and residue over time. This gradually reduces their grip, which can cause jams even with freshly loaded, good-quality paper.

A few maintenance habits help:

Wipe accessible rollers gently with a lint-free cloth, lightly dampened if your printer manual allows it.
Check for small scraps of torn paper left behind by a previous jam, since these commonly cause the next one.
Keep the printer's surrounding area free of dust, since this gets drawn into the paper path over time.
Check for printer driver or firmware updates occasionally, since outdated software can sometimes contribute to feed issues on some models.

If jams continue after good paper handling and basic cleaning, this points toward a genuine mechanical issue rather than a paper problem, and professional servicing may be worth considering.

It helps to work through paper-related causes first, since they are the easiest and cheapest to rule out. Try a fresh, properly stored ream loaded correctly and within the tray's fill limit before concluding that the printer itself needs attention. Many households and classrooms find that a jam problem considered persistent for months clears up within days once paper handling habits change, without any repair or replacement needed at all.

What to Do When a Jam Happens

Safe steps for clearing a printer paper jam

Clearing a jam correctly prevents it from causing a second, immediate jam straight after.

Turn off and unplug the printer before reaching inside, for safety.
Open the access panels as directed by your printer's manual, rather than forcing the tray or lid.
Remove the jammed paper slowly and carefully, following the removal direction given in your printer's manual. Avoid forcing or tearing the sheet.
Check for torn scraps left behind. A small piece of paper left in the path is one of the most common causes of an immediate repeat jam.
Close the printer fully before restarting, since many printers will not resume normally with a panel left ajar.

A Simple Prevention Checklist

Keep reams sealed until needed, stored flat and away from damp areas.
Match paper weight to your printer's settings, especially for anything heavier than standard 80gsm.
Avoid mixing paper weights in the same tray.
Fan and square the stack before loading.
Keep the tray within its recommended fill level.
Clean rollers periodically and check for leftover scraps after any jam.

Paper Option at School Stationery Supplies

The product below is available through our Notebooks & Paper collection. Confirm current stock before ordering.

Product	Verified details	Suits
ECOEARTH Recycled Copy Paper A4 80 GSM	A4, 80gsm, 100% recycled, 500 sheets per ream	80gsm A4 copy paper for everyday home and school printing; check your printer's specifications for supported paper weights.

Choosing a reliable, consistent paper weight and keeping it stored well is one of the simplest ways to reduce jams before they start.

Common Mistakes That Lead to Jams

Overfilling the tray to avoid refilling it as often: Staying within the printer's recommended fill level helps reduce feeding problems.
Leaving an opened ream exposed to air for weeks: Moisture absorption builds up gradually and is easy to miss.
Loading heavier paper without checking the printer's paper-type setting: Selecting the setting recommended by the manufacturer can improve feeding and print results on some models.
Yanking a jammed sheet out quickly: This tears the paper and leaves scraps that cause the next jam.
Ignoring roller cleaning entirely: Dust and residue build up gradually, and a printer that has not been cleaned in a long time is more jam-prone regardless of paper quality.

Frequently Asked Questions

Why does my printer keep jamming even with new paper?

New paper can still jam if the tray is overfilled, the paper weight does not match the printer's settings, or the guides are not adjusted correctly. Paper age is not the only factor.

Can humidity really cause printer jams?

Yes. Paper can absorb moisture from humid air, which may cause sheets to curl or stick together and disrupt feeding. Keeping paper sealed and stored appropriately can reduce this risk.

Does heavier paper cause more jams?

Some printers may require a different paper-type setting for 100gsm or similar heavier stock, so check the manufacturer's guidance for your model.

How much paper should I put in the tray?

Stay within the fill line marked on the tray, or below your printer's stated maximum sheet count. Overfilling is one of the most common jam causes.

Why does my printer say there is a jam when no paper is stuck?

A small piece of paper or another obstruction can trigger a jam warning even when the main sheet has already been removed. Check the paper path carefully and follow your printer's troubleshooting instructions. If no obstruction is found and the warning continues, the printer may need further diagnosis.

Fixing the Paper Habit, Not Just the Printer

Repeated printer jams can often be traced to paper condition, storage, loading, paper settings or feed components, although persistent problems may also indicate a printer fault. Keeping paper sealed and dry, matching weight to your printer's settings, loading correctly, and clearing jams carefully together can help reduce recurring feed and jam problems.

For the full picture on choosing and storing school and home paper, see our notebooks and paper for school guide. Ready to restock with reliable, standard-weight paper? Browse our Notebooks & Paper collection.

Supporting Articles in This Series

About the Author:

The School Stationery Supplies Team publishes practical buying guides for Australian students, parents and teachers. Visit School Stationery Supplies for notebooks, paper, pens and school essentials.