Tech found circuit 1 contactor failed. Technician cleared alert system started both circuits when tech called with thermostat and cir1 would not engage only circuit 2 tech tested all sensors found no challenges. Technician bypassed proven fault and wired directly to contactor. When called y1 compressor would engage eveytime. Tech suspects either proven switch is malfunctioning or add board is due to not sending 24v from board to contactor. Will inform office and follow up.