Canon Printer Not Printing? The 15-Minute Checklist That Fixes 90% of Issues

Deadline in two hours. Client waiting. And the printer is blinking an orange light you've never seen.

I've been there—more often than I'd like to admit. In my role coordinating print production for events and corporate clients, I've handled 200+ rush orders in the past five years, including same-day turnarounds for trade show booths and product launches. When a printer dies mid-job, it never happens at a convenient time.

So I built this checklist. It's the exact sequence I run through when a Canon printer stops printing. It fixes about 90% of the issues I run into, and most fixes take under five minutes per step. Follow the steps in order. There's a logic to why they're arranged this way.

Step 1: Check Power and Cables

Start with the boring stuff. Is the printer actually on? I've spent forty minutes troubleshooting a printer that got unplugged by the cleaning crew.

Check the power light. Is it steady or blinking? If it's blinking, the printer is trying to communicate an error—jam, ink issue, paper problem. If you're using a USB cable, unplug it and reseat it. Cables work loose, especially if the printer gets bumped.

In March 2024, we almost booked a $120 service call for a printer that turned out to have a loose USB cable. A $7 replacement cable solved it. That's when I stopped assuming hardware failures were complex.

Step 2: Decode the Error Message

Newer Canon printers—PIXMA, TS, MG, G-series—show error codes on the LCD. If your model doesn't have a screen, watch the LED blink pattern. Common codes:

• 2 blinks: paper jam or no paper
• 3 blinks: partial paper jam
• 5 blinks: print head / cartridge issue
• 7 blinks: ink cartridge not detected

Take thirty seconds to look up the exact code before doing anything. I used to skip this step. A colleague once yanked a jammed sheet out too hard and damaged the paper feed roller. That repair cost $180 because he didn't check how deep the jam actually was.

Step 3: Check Ink Levels—Including the 243 Cartridge

Low ink causes more print failures than people think: mid-job stops, blank pages, faded output, even spurious “cartridge error” messages.

To check ink levels on a Canon printer:

1. Open the Canon PRINT app on your phone (or check the printer's LCD display).
2. Look for the ink level / remaining ink menu.
3. If you have a PIXMA TS3500 or TR4500 series, you're likely using the PG-243 (black) and CL-243 (color) cartridges. I want to say those are the most common entry-level cartridges, but don't quote me on that—check your manual.

Here's something printer vendors won't tell you: ink level readings are estimates. They're based on usage patterns, not real-time sensors. I've printed another 50 pages on a cartridge that showed “empty,” and I've watched a “half-full” cartridge die on the spot. The only real test is a test print. Keep a spare cartridge on hand.

Speaking of spares: if you're using Canon printer ink 243 cartridges, they run out faster than you expect. They're entry-level cartridges with modest page yields—realistically around 180 pages for the PG-243 black, and less if you print lots of solid color. Buy ahead, not during a deadline emergency.

One more ink thing. Third-party “compatible” cartridges are tempting when they cost half of genuine. I've tested them. A $15 pair of compatible 243 cartridges printed about 70% of the pages before going streaky, and one leaked and stained the paper feed. Genuine ink costs more upfront but wins on cost per page. In a rush job, the last thing you need is a cartridge failure.

To be fair, some third-party brands are decent. But if the job is urgent and you haven't tested the brand, genuine ink reduces risk. Here's the thing: “compatible” doesn't mean “identical.”

Step 4: Run the Nozzle Check and Print Head Cleaning

If the printer works but output looks faded, streaky, or missing lines, the print nozzles are likely clogged. This is very common on inkjets that sit idle for a week or two.

The fix sequence:

1. Go to the Maintenance or Setup menu in the Canon PRINT app (or on the printer itself).
2. Run Nozzle Check and print the test pattern.
3. If lines are missing, run Print Head Cleaning.
4. Print the nozzle check again. Repeat cleaning if needed, but no more than twice—excessive cleaning wastes ink.

This matters more than it looks. The industry standard for commercial print is 300 DPI at final size. If your nozzle pattern is missing lines, you're effectively printing at lower resolution, meaning barcodes might not scan and text looks fuzzy.

We had a printer sit unused for three weeks in early 2024. The first batch of 50 event badges came out with white stripes through the barcodes. The nozzle check caught it. Two cleaning cycles fixed it, but we almost missed the shipment window. That's when I added “print a test page every Monday morning” to our routine.

Step 5: Inspect the Paper Path

Paper jams are the obvious failure, but the subtler issue is paper type settings. If the printer is set to “plain paper” and you loaded heavier stock, you'll get smearing, poor ink adhesion, or feed errors.

Check these:

• Is the paper loaded correctly, with the guides snug but not tight?
• Does the paper type in the print dialog match what's physically in the tray?
• Is the paper flat and dry? Damp or curled paper causes jams—and a jam during a rush is a 20-minute loss.

Know your paper weights. Standard copy paper is 20 lb bond (75 gsm). Premium letterhead is often 24 lb (90 gsm). Brochure weight is 80 lb text (120 gsm). If you load heavy stock into a printer rated for lighter paper, check the printer's specs first. The machine isn't going to magically handle what it's not rated for.

For USPS mailings, also check envelope size. Letters range from 3.5 × 5 inches minimum to 6.125 × 11.5 inches maximum. Large envelopes (flats) go up to 12 × 15 inches. Print settings that don't match the physical envelope will shift alignment. According to USPS pricing effective January 2025, a First-Class Mail letter is $0.73 and a large envelope is $1.50—so if you're printing mailers, misaligned output burns cash at the post office.

Step 6: Verify the Connection

If the printer shows no errors but still isn't printing, check the connection. This is the #1 cause of “printer won't print” when the printer thinks it's fine.

On WiFi:

1. Check the WiFi light. Solid = connected. Off = not connected.
2. If off, press and hold the WiFi button to enter setup mode, then re-connect through the Canon PRINT app.
3. Confirm the router is broadcasting on 2.4 GHz. Some Canon printers have issues with 5 GHz-only networks.
4. Check the distance between printer and router. A printer in a supply closet at the edge of the floor is going to drop signals.

I once worked with a client who had a 12,000 sq ft floor and every printer tucked into one corner. Print jobs kept timing out across the floor. We moved the high-use printer closer to the team and the issue basically vanished. If you're planning an office layout, use a sq ft calculator to map where printers sit relative to your team and router. Printer placement is an infrastructure decision, not a furniture arrangement afterthought.

If the connection still fails, restart everything—router, printer, computer—in that order. This fixes more connection issues than any driver update.

Step 7: Update or Reinstall the Driver

This is the last step in my checklist, and it's the root cause less often than you'd think. But when it is, it's almost always because a Windows or macOS update broke the printer driver.

To update:

1. Visit Canon's official support website, enter your model number, and download the latest driver for your operating system.
2. Install it and restart the printer.

Don't use random “driver updater” software from third-party websites. You'll trade a printer problem for a much worse one.

Special Case: Canon SELPHY CP1300

The SELPHY CP1300 is a dye-sublimation photo printer, not an inkjet. The troubleshooting logic is a bit different:

• Check the ribbon cartridge. It must match the paper size in the tray. If you see a “ribbon and paper size don't match” message, that's the problem.
• Use the dedicated paper tray that came with the printer. It only accepts specific paper sizes (usually 4 × 6 inches).
• There's no ink to check. If prints look faded or banded, the ribbon cartridge is exhausted or mismatched.

We used a CP1300 for a wedding guestbook in October 2024. It stopped printing 15 minutes before the ceremony. The ribbon didn't match the new paper pack we'd loaded. Swapped it out and we were back in business.

When Do You Stop Troubleshooting?

This is where total cost thinking comes in. I used to throw hours at a printer worth $80. That's a losing game.

Here's the math: if your printer is three years old and needs a $90 repair, that's a big percentage of the cost of a new $130 model. Factor in your time, the deadline risk, and the frustration, and replacement is often the smarter call.

The flip side is also true: if your printer cost $1,000 and the repair is under $300, get it repaired. Look at the total cost, not just the repair price tag. It's the same reasoning I apply to any vendor quote—look at the full picture, not just the upfront number.

Common Mistakes to Avoid

These are the errors I see repeated:

• Using third-party ink during an urgent job. The savings aren't worth the risk of a cartridge failure at the worst moment.
• Not running a test print. If you're printing 80 copies of anything, print one first and inspect it. Every single time.
• Having no backup plan. Keep a spare printer for critical jobs. Ours is a $79 Canon PIXMA that has saved multiple deadlines. It's paid for itself three times over.
• Calling an emergency technician too fast. Most fixes are in this checklist. Calling a tech is a last resort, not a first step.

And one more note: this checklist works beyond Canon printers. If you've been searching “why is my hp printer not printing,” the same logic applies—check power and cables, check ink, run the cleaning cycle, inspect paper, verify connectivity, then update drivers. I've used it on HP, Epson, and Brother machines. Error codes differ, but the troubleshooting order doesn't.

Even in less obvious settings—like a biotech lab where a label printer failed mid-run, right after a researcher confirmed a peptide sequence using a peptide calculator and needed 40 vial labels before a client review—the same sequence saved the day. The fix was a paper type setting. Simple. When you work through the checklist in order, you give yourself the best chance of catching the simple stuff before the deadline slips away.