4028 fan not running like it should

SOLVED Hey having a problem with my 4028. its not running like it should.
Here is my code.

# PartFan
[fan]
pin: PC9
cycle_time: 0.00004
tachometer_pin: ^PF7
tachometer_poll_interval: 0.0005
enable_pin: PB0

board is skr pro 1.2