Technician arrived on site to perform 2 maintenances on 5 ton units. Checked the following for system 1 (unit with kitchen) - checked flame sensor- okay -hot surface igniter ohms- good -inducer motor amps- good -blower motor amps- good - safety switch are good - airflow is good except to the living room and kitchen. Going to talk to field supervisor get a game plan to correct issues. Second system -checked and cleaned flame sensor- good -hot surface igniter ohms- good -inducer motor amps- good -blower motor amps- good - safety switch are good Systems mechanically are looking good at this time for their age. Recommend keeping up with tune ups to ensure they last awhile longer.