@leakcheck219: Performed a Leak check and repair and found the leak on a schrader core on the discharge line ,swapped out the old pin and replaced with a new pin,removed liquid line filter drier and replaced then pulled a deep vacuum and broke the vacuum with 422B refrigerant unit back working again#Construction #AC #Preventative Maintenance #learnhvac #Construction #Refrigeration #hvac technician #hvac installation