my 1997 ford e350 clubwagon van air conditioner hessitates when turning it on? on 1997 Ford E-350

its doesnt throw really cold air neither.

Asked by for the 1997 Ford E-350
It's 15 years old, when was the last time you added freon to the system? If it gets to low, the pressure switch will cut out the system all together. Have it checked! Goodluck