DCM1 complete; Heat; (1) F16201 replaced. System was zoned atone time, zone board and zone dampers have been disconnected. Upstairs thermostat is non-operational Unable to complete outdoor portion of maintenance. Vegetation is overgrown around outdoor unit and yellow jackets have a ground hive ( stung twice while approaching unit and tenant stated landscaping crew was complaining about same issue ). Need to remove vegetation and get an exterminator to remove yellow jackets before returning. AHU heat sequencer has failed. Only one of two electric strip heat are energizing. Emergency heat isn’t wired in at the thermostat.