The bare minimum basic repairs to get the system running today. Customer has 14 y/o AireFlo system that operates for upper level. System was not heating due to faulty flame sensor. Replaced flame sensor. Cleared pressure switch tubing. Noticed that inducer motor is declining. Flue venting is single wall and incorrect. Installed wet switch and inline water safety for water protection. Blower wheel cleaning needed. Blower motor bearings are bad. Run capacitor is bad. Noticed significant biological growth presence on drain line entering evaporator coil. Recommend UV BlueTube to target and prevent biological growth. Recommend thermostat replacement. Informed customer of all findings. System is currently working.