If 'Error 50' persists after basic troubleshooting, does it necessarily mean the fuser unit needs to be replaced on a Brother printer?

In most scenarios, if 'Error 50' persists after trying power cycling, checking for paper jams, and ensuring components are seated correctly, it is a strong indication that the fuser unit itself is faulty and requires replacement. The fuser has a limited lifespan, and this error code often signifies its end. While less common, a defective main board or power supply could also potentially trigger a fuser error, but replacing the fuser unit is typically the primary and most effective solution.