Arrived in Elgin for AC Maintenance, Upon our arrival we spoke with the customer about their concerns with the system, not cooling well. Performing our diagnostics and checking the fault codes at the UI control we found that the system has had several indoor air movement system faults. We are going to replace the main control board and the indoor air movement system under the 10 year p&l. Spoke with the customer about our findings today and let him know the office will reach out to schedule a return once parts are received.