In Litchfield Park, AZ: UPON ARRIVAL CYCLED UNIT INTO COOLING MODE. NOTICED NO SMELL PRESENT AT TIME OF VISIT. OPENED UP ALL PANELS TO AIR HANDLER . NOTICED NO GROWTH ON BLOWER WHEEL NOR INDOOR COIL . CHEMICALLY CLEANED AND SANITIZED INDOOR COIL (BOTH SIDES) AND CLEANED AND WIPED DOWN BLOWER WHEEL . UPON DEPARTURE UNIT WORKING PROPERLY AND WITHIN SPEC. ONCE AGAIN DID NOT FIND GROWTH OR SCENT AT TIME OF SERVICE.