Technician arrived to customers home. Technician talked to homeowner and asked questions about home. Homeowner said sometimes the master bedroom will not get cold. Technician started inside air handler. Technician checked heat strips they where good. Technician checked plenum blower wheel and came across mold starting to grow along sides of unit inside. Technician mentioned to homeowner. Technician then headed outside and took readings of refrigerant on condenser unit. Technician checked electrical readings and where in range. Technician took condenser grilles off and washed and waxed. Technician then wrote down recommendations for uv germicidal system. Technician talked to homeowner and they said they would hold on since they just got done remodeling the kitchen.