Arrived on site to perform repair on 14 year old unit. Tenant states system is not operating. Per nick the circuit board was replaced recently before he purchased home. Cycled system for cooling. Indoor unit cycles on, outdoor unit is unresponsive. Checked outdoor unit electrical and system components. System is recieving proper high low voltage power but there is no low voltage command present. Performed troubleshooting on wire from condenser to furnace and found that wires that were being used were shorted out, and also found a bad contactor low voltage coil. Wire had spares so Rewired at furnace as well as at outdoor condenser. Replaced primary motor control. Cycled system on and system started cooling. Temperature split is in range. Checked system amp draws. Went over all findings and recommendations with homeowner. Wants to hold off on maintenance program and only take care of what’s immediately necessary. System is operational upon departure.