Homeowner has existing York high efficiency natural gas furnace (60K BTU) with a 2 ton ac system. Found system slightly undercharged. Advised homeowner I would make a special exception to add 2-3 lbs of a hybrid R-22 style refrigerant with the expectation that the equipment should be upgraded in the near future. I will advise our comfort advisor with customer information and we will provide a FREE estimate to upgrade the equipment. Today’s repair work is NOT guaranteed and strictly done in an attempt to provide somewhat better cooling operation. We can not guarantee this will get the system through the season. Homeowner is aware and authorized me to add the refrigerant (R-422b/NU-22).