Arrived at customer's house for a system inspection. On arrival customers showed me to air handler unit. Air handler unit was clean. Next went downstairs to condenser and hooked up gages. Pressures and readings were showing signs of low freon. Pointed this out to customer and suggested we add some. Customer agree. Added one pound of free on before pressures and reading started looking correct. Contactor sending proper voltage. Capacitor within acceptable range. Unit checks out. Collected payment and signatures from customer and left. Customer happy.