Why isn't the a/c cooling? on 2006 Mercury Montego

I tried adding refridgerant to it, but it won't take a charge.

Asked by for the 2006 Mercury Montego
1 answer
That's why it requires a professional tech to diagnose the a/c.
I know we already have to much federal and state mandates, but self charge kits for a/c systems need to be outlawed.