checked indoor cooling coil for buildup and found small amounts of buildup by removing in the indoor coil from cabinet (see photo) Checked indoor blower wheel for buildup and found small amounts of buildup bt removing the upper door panel (see photos) System could use a cleaning to keep in max efficiency Performed a courtesy leak search on the cooling coil using big blue no bubbles found as used a electronic leak detector with no issues found Performed courtesy leak search outdoor and found a leaky valve core leaking under the cap (see video) Tightened using a core tool but still leaking - needs a valve core tool to remove vale and replace properly (still leaking) System is currently low on refrigerant (see photos) system low approx. 3 lbs of r410 refrigerant - found valve steam leaking on system that is not used for servicing add refrigerant to achieve indoor comfort