The most common reason is low refrigerant. You need to have a HVAC company come out and check for leaks, and to recharge your system
The system can be low on refrigerant
Condensor
it depends on many factors, like indoor and outdoor temps, and type of system and refrigerant being used.
Refrigerant compaticilty is about suiting the refrigerant to your refrigerant system. Every cooling system has refrigerant in it which depends on the type of system you use. If the refrigerant not matches with your system, it wont work. This is refrigerant compatibility.
overcharging a central air unit system with refrigerant(freon) will cause the head pressure to be?
orifice
Have a CERTIFIED PROFESSIONAL - who will know what they're doing - recover and replace the blended refrigerant. AC system work - whether at the home or on a motor vehicle - is NOT a "do it yourself" task, and it seems now that you have a better understanding of why that is.
Check with a local hvac contractor for an estimate.
Have the refrigerant level in the A/C system checked. Rapid cycling of the compressor can be one of the signs that your refrigerant level is low.
It is a narcotic and causes central nervous system depression.
Multiple sclerosis
To endure that the ONLY gas in the system is refrigerant.