Ender 3 V3 SE PSU fan runs at 100% immediately after power on
Hi everyone,
I have an Creality Ender-3 V3 SE and recently the power supply fan started spinning at full speed immediately after turning the printer on.
Before, the PSU fan only turned on when the power supply got hot enough, which seemed normal. Now it runs at maximum speed all the time from startup.
What I already checked:
- Replaced the fan with a new one
- The issue is still there
- Printer otherwise works normally
- No obvious burned components on the PSU board
So I think the problem may be:
- fan control transistor/MOSFET,
- thermal sensor,
- or PSU fan controller failure.
Has anyone had the same issue on the stock PSU?
Did you repair the board or just replace the power supply?