BROTHER Error Code 117.370
HIGHFuser Unit Malfunction or Overheating
Error 117.370 on Brother printers typically indicates a problem with the fuser unit, often related to its temperature regulation or a general malfunction.
The fuser unit is a critical component in laser printers responsible for melting the toner powder onto the paper using heat and pressure. Error code 117.370 specifically points to an issue within this unit, which could be a failure to reach the correct operating temperature, an overheating condition, or a sensor malfunction that prevents the printer from accurately monitoring the fuser's status. When this error occurs, the printer's safety mechanisms usually prevent it from operating to avoid damage to the fuser or potential fire hazards. Common causes for this error include a worn-out fuser lamp, a faulty thermistor (temperature sensor), a problem with the fuser's heating element, or issues with the power supply to the fuser. Less commonly, it could be triggered by a persistent paper jam that has stressed the fuser, or a software glitch. Because the fuser operates at very high temperatures, any deviation from its normal functioning can lead to this protective error code.
- 1
Turn off the printer completely and unplug it from the power outlet. Wait for at least 15-20 minutes to allow the fuser unit to cool down completely.
- 2
Plug the printer back in and turn it on. Observe if the error clears after a full power cycle. Sometimes, a temporary glitch can be resolved this way.
- 3
Open all access panels and carefully check for any visible paper jams, especially around the fuser area (often located near the output tray). Remove any jammed paper gently, pulling in the direction of the paper path.
- 4
Ensure the printer is in a well-ventilated area and not enclosed in a cabinet, as poor ventilation can contribute to overheating. Clear any obstructions around the printer's vents.
- 5
If you are comfortable and your printer model allows, try removing and reseating the fuser unit. Consult your printer's manual for specific instructions on how to access and handle the fuser, as it can be hot and delicate.
- 6
Check the power source. Plug the printer directly into a wall outlet, bypassing any surge protectors or power strips, to rule out insufficient power supply issues.
- 7
Update the printer's firmware. Visit the Brother support website for your specific model and download the latest firmware. Follow the instructions carefully for installation.
You should call a specialist if the error persists after performing all the DIY troubleshooting steps, especially after multiple power cycles and thorough checks for paper jams. Since the fuser unit involves high heat and complex electrical components, attempting to repair it yourself beyond basic checks can be dangerous and may void your warranty. If the error code points to a faulty fuser lamp, thermistor, or heating element, these are internal components best replaced by a trained technician. A specialist will have the necessary diagnostic tools and replacement parts to safely and effectively resolve the issue.
Find a certified printer specialist near you →$200-$450
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- • Brother HL-L5200DW
- • Brother MFC-L6700DW
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- • Brother DCP-L5500DN
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