03
HP Printer
Severity: MinorWhat Does This Error Mean?
Error 03 means the printer is warming up its fuser unit. The fuser heats the toner so it bonds to the paper. This is usually normal — but if it never clears, there is a problem.
Affected Models
- HP LaserJet 1010
- HP LaserJet 1020
- HP LaserJet 1022
- HP LaserJet 1200
- HP LaserJet 1300
Common Causes
- The printer was just turned on and the fuser is still heating up
- The printer is in a cold room and needs extra time to warm up
- The fuser unit is failing and cannot reach operating temperature
- A firmware glitch is preventing the warm-up cycle from completing
- There is a power supply issue delivering insufficient power to the fuser
How to Fix It
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Wait 60 seconds. Error 03 often clears on its own as the printer finishes warming up.
This is completely normal behavior when you first turn the printer on.
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If the error persists, turn the printer off. Wait 30 seconds, then turn it back on.
A full power cycle resets the warm-up timer and clears minor firmware glitches.
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Move the printer to a warmer location if the room is cold. Cold temperatures slow the fuser warm-up.
HP printers are rated to operate between 50°F and 90°F (10°C to 32°C).
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Check that the printer is plugged directly into a wall outlet, not a power strip or extension cord.
Insufficient power delivery can prevent the fuser from reaching the right temperature.
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If the problem keeps happening, check HP's support site for a firmware update for your printer model.
Firmware bugs occasionally cause the warm-up cycle to hang.
When to Call a Professional
If error 03 stays on screen for more than five minutes, the fuser is likely failing. Fuser replacement is a common repair. Cost is typically $50 to $150 for parts and labor depending on your model.
Frequently Asked Questions
How long should the warm-up take on an HP LaserJet?
Most HP LaserJet printers warm up in 10 to 45 seconds. If error 03 shows for more than two minutes, something is wrong. Try power cycling the printer first.
Does error 03 damage the printer if I leave it?
No. The printer simply will not print until it finishes warming up. However, if the fuser is the cause, leaving it on repeatedly could shorten the fuser's life. Get it checked if the error happens every time you turn the printer on.
Can I print while error 03 is showing?
No. The printer is not ready yet. Wait for the display to show 'Ready' before sending a print job. Sending a job too early can cause it to queue up or fail.