Completed maintenance on two heat pump systems. Changed upstairs' clogged filter. Recommend pan switch water safety for attic unit as it doesn't have one and customer has water problems. Upstairs air handler has mold present inside, recommend apco air purifier to kill mold, bacteria, germs, and viruses and prevent future mold growth for improved air quality. Downstairs air handler has a very damaged, nonfunctioning blower wheel. Blower motor capacitor is weak as well. Due to age and condition of system and cost of repairs, recommend upgrading system to a more reliable, more efficient system. If the customer wants repairs, we will need to replace the blower motor and blower wheel assembly along with the blower motor capacitor. Recommend hard start kit for the upstairs system to take a load off of the compressor to prolong the life of the system. Upstairs system is heating at this time. I put customer down for a tune-up if they want to upgrade to the maintenance plan.