Ptac 14- systems working as intended Ptac 15 Ptac 16 Ptac 22 Ptac 23 Ptac 29 Ptac 21 Ptac 27 - error FH. Bad temperature sensor for return air Ptac 28 - bad dehumidification fan- fan disabled for time being to stop squealing Ptac 13 - short cycling. Heat kit is working at this time however unit will not run in cooling