Saturn vue a/c not working?

I have a 2005 saturn vue with the honda 3.5l
The ac used to work then it started blowing hot air. If rpm's were high then it would blow cold air.

I took it to a shop, the checked the pressure while running (low side I believe) which read about 60-65. And even higher when turned off.
They said it had too much pressure and let some out (to about 35 I think)

Now it only blows hot air no matter the rpm's.
Also, when I turn the ac on I can hear a hissing sound now coming down from my air controls (but not with ac off)

The ac clutch IS engaging. But it stays engaged as long as the ac is on, it does NOT cycle on/ off, it stays on constantly.

Anyone have some ideas I can check befor wasting my money on another place?

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