Observations - PRESSURE SWITCH FAILED - HEAT EXCHANGER WAS INSPECTED & FOUND MULTIPLE CRACKS & A HOLE IN HEAT CHAMBER. - EVAPORATOR COIL IS EXTREMELY FILTHY W/ DUST/DIRT & BIOLOGICAL GROWTH! DUCTS & BLOWER DIRTY AS WELL. - NO FLOOD PROTECTIONS INSTALLED & NO SECONDARY DRAIN PAN UNDER UNIT. - OUTDOOR COND. COIL VERY DIRTY & CONTACTOR IS PITTED! Based on our findings today, it might be time to think about getting a brand new system.