PCSA 2022 Heating Check Up Renewal System was 6 lbs low on R-410A. Need to schedule leak search immediately. Breaker was also dead for electric heaters 3 and 4. Breaker for heaters 1 and 2 was replaced a few years ago. 11/2/22 Performed leak search but was not able to find anything certain. Major signs of rust and deterioration around the base of the outdoor coil and on the side of the indoor coil. Double checked Puron levels and they appear normal at this time. Recommend customer uses system normally for a few weeks and then check Puron levels and double check most likely locations for leak with another leak detector. 12/9/12 Found a leak on indoor coil on the left side at the bottom corner. Leak searched outdoor coil and found a possible leak coming from valve core for suction line. Tightened valve core and it no longer has any signs of leaking. Also detected possible leak at suction line shut off valve. Backed valve all the way to the top and had no more signs of a leak. Did the sa