Fix HP Error 50.3: High Fuser Temperature Error

critical Severity: critical

If your HP printer is displaying error 50.3, do not worry – this is a known issue with a proven fix. This error typically indicates high fuser temperature error that can usually be resolved without a service call. Follow the steps below to clear this error.

What Causes HP Error 50.3?

This error can be triggered by one or more of the following issues:

• Fuser thermostat failure allowing overheating
• Fuser control circuit malfunction
• DC controller board failure
• Ambient temperature too high for safe operation

How to Fix HP Error 50.3

Follow these steps in order. After each step, check whether the error has cleared before proceeding to the next one.

1. Step 1: Turn off the printer immediately and unplug it
2. Step 2: Allow the printer to cool for at least 30 minutes
3. Step 3: Ensure adequate ventilation around the printer
4. Step 4: Move the printer to a cooler location if the room is very warm
5. Step 5: Power on after cooling — if the error clears, monitor for recurrence
6. Step 6: If the error persists, the fuser or DC controller needs replacement

Affected HP Printer Models

The following HP printer models are known to display error 50.3:

• HP LaserJet Pro M404dn
• HP LaserJet Enterprise M607dn
• HP LaserJet Enterprise MFP M635h

Related HP Error Codes

If you are troubleshooting error 50.3, these related error codes may also be relevant:

• 49.4C02 – Critical Firmware Error
• 50.2 – Fuser Warm-Up Error
• 13.A3 – Paper Jam in Tray 2/3 Area
• 79 – Service Error – Critical
• 59.F0 – Motor Error