Follow up is needed. Need to contact manufacturer/Tech support to further diagnose issue with error code A0-01 Return to replace indoor control board. Replace board and surge protector at indoor air handler. System is still displaying error code A0-01 at thermostat after replacement of board. shut power to unit. Tried to reset condenser. Try to put system in test mode. System would not operate. Thermostat keeps displaying error code. Check thermostat previous error code to be the same. Check all wiring connections. communication issues with system failure. Office to schedule with time to contact manufacturer. Customer is aware office will follow up to schedule appointment View visual findings from this job here - https://visionshare.xoi.io/?id=XA-A3D0-78D6A2FF7BE3426F860C56602DED582D