Arrived on site to perform fall tune up on 2 2004 Goodman system. Furnace and evaporator coil located in attic. Client stated no issues. Cycled both systems on heating. Advised I would be inspecting Both units inside and out . Inspected ducting and heat exchanger as well. Advised the summary of findings are as followed. Main house furnace 1. 2004 units located in attic. 2. Found thermostat faulty and not communicating to furnace for command of cool. 3. Found filter really dirty and clogged. Replaced filter. 4. Found black flex ducting undersized creating restriction of air flow to home. Air flow has a lot of restrictions due to not enough return to system. 5. Blower assembly are dirty. Wheel is accumulating dust and build up. Creating stress on motor. 6. Blower motor is now leaking some oil as it has layer of oil on motor from stress build up added. Secondary motor control is now weak and out of range from motor over working. Recommend replacing control 7. Evaporator coil is slig