Performed an a/c tune up and a safety inspection. Air conditioner is performing and running to manufacture specification paperwork. There seems to be a little late coming out of the Schrader valve on the air conditioner. Tried to tighten the shredder valve and wouldnâ€™t tighten anymore. Tighten down the fitting so none will leak. Drains are draining properly. Changed the filter. Performed a safety inspection, all high-voltage Landed at ports properly and properly supplying air conditioner. All low-voltage wiring communicating properly.