[Khan535i]

I'm not sure if this is the right forum to ask this question in, nevertheless, I have a 440i and the AC has been blowing hot air. At first the AC compressor would kick in for like a second and stop. I checked the pressure with a Freon kit gauge and it was super high, like 80 psi. I kept releasing until 45 psi and the compressor started to cycle normally, but still hot air. Then I released all the Freon and started adding till the pressure was around 40-45 psi. Now the compressor kicks on when the AC is active but doesn't cycle, and the air is still blowing hot air. I'd assume the compressor isn't the issue here, and I guess neither is the Freon level because I emptied it all and refilled it. What seems to be the issue?