Performed two Air conditioner tuneups. Replaced a 16x25x4 filter and a 20x25x4 filter. Cleared out both units drains, cleaned both condensers and cleared out all debris inside of the units. Both capacitors are within specs and wiring looks good. The older unit (1999) is operating properly, however it is low on refrigerant. It will still cool, but not as efficiently and considering its age it would be my recommendation to get this air conditioner replaced. Our comfort advisor Ian can come give a quote upon request, if you are interested give our office a call. Thanks! Brady. Office please bill