Performed AC Diagnostic on 2011 Bryant condensing unit. Upon arrival homeowner called in stating that his Property in California is no longer cooling at which his daughter is a tenant at. Valerie did mention that she noticed last month it was no longer Cooling in the previous month before that it was showing signs of loss of efficiency and extended time still temperature starts to drop. 1. Found that system was completely almost empty of its R410a refrigerant charge. This is due to a leak somewhere within the refrigeration cycle 2. Proceeded to attic and found that evaporator coil is the main location of where the refrigerant leak is occurring. Unfortunately the coils made out of an aluminum and cannot be soldered and must be completely replaced. Informed and discussed for conditioning system with Conrad and at the moment he has no urgency to do anything and would like to wait about a week or two so That he can get the funds arranged. Once he determines that he will give us a call. At