I arrived to perform a diagnostic on an air conditioner. Upon inspection, I found system off. Homeowner had the complaint of no AC the day before so she shut it off and left it running just fan. When she woke up fan was not running. Checked filter - clean. Checked blower wheel - clean and clear. Bearings are tight. Even with jumping “Y” or “G” no control with jumpers even with furnace control board having 28 volts. Was able to get the heat to jump on to check opportunities blower - 6 amps within spec. Furnace control board has failed to close internal relays for AC and fan preventing operation. Need to make repair to further troubleshoot. Checked AC operation by pushing in the contactor - compressor and fan came on. Explained to homeowner with the age of the furnace and the cost of repair I recommended replacing furnace.