Ender 3 Pro with CR touch running Marlin 2.1. Got it new in January of 2023, installed the CR Touch and installed Marlin. Added a Creality glass bed. Worked great.
About ten months ago, I started getting occasional print failures. Clogs, terrible adhesion, stringing. It quickly reached the point where any print longer than around an hour failed. In frustration, I quit. About a month ago, I tried again. Tightened every bolt, cleaned everything. Installed the latest version of Orca Slicer. Ran the Orca calibration prints, they all succeeded. Still, any print longer than about an hour failed.
Replaced the nozzle. Same results. Replaced the hot end with a Metal Swiss, replaced the Bowden tube and replaced the nozzle again. Same results. Different filament types (PLA, PLA+). Different filament manufacturers. New filament. Old filament. Nothing will get this thing back to work.
I’ve put $100 of replacement parts into a $250 printer. According to the printer stats, I’ve done 327 prints with a total of 38 days, 20 hours (932 hours). Is this the lifespan I should expect from an Ender 3 Pro?