Replaced disconnect box. Replaced contactor. Need bigger wire nuts to properly secure high voltage connections. Tested system. System fired up. Unit blowing cold. System is very low on refrigerant. Would need to perform leak search to determine where unit is losing refrigerant. Unit uses r22 refrigerant and holds 121 oz. (7.5 lbs). Signed up on club membership for routine maintenance and savings. Recommend replacing hvac due to age/reliability, operating condition/cost of repairs and r22 phaseout.