Upon arrival client stated system was not keeping up well again Inspected both upstairs and downstairs systems to find this time the upstairs system is low on r-410a. Performed a free leak search to find a leak in the indoor evaporator coil. System is roughly 8 years old and is out of warrranty. Made clients aware and also that I can not give a price on a out of warranty evaporator coil today but can send one on Monday morning. I did send a quote to replace both upstairs and downstairs systems. Topped upstairs 2.5 ton system off with 4lbs r-410a to get by and made aware we would credit money spent today If quote is approved for replacement. We will be upsizing both systems. Will need to enlarge 12” return duct downstairs to a 14” to allow better air return.