AC comes out hot then cold

Hello, is it hot then cold out of every vent? Or are some vents different temperature? There are many possible causes of air conditioning intermittent failures. Some have to do with the air conditioning compressor not working as it should all the time, or a faulty relay. Some could have to do with a condenser fan that does not turn on when it needs to. If you say you have cold air sometimes, it sounds like the refrigerant system is at least intact and not leaking. If it never got cold, the system could have a leak. Hands on diagnostic testing by a technician with section 609 EPA authorization to handle refrigerants is needed. Seek guidance at a local shop near you. https://repairpal.com/auto-repair-near-me