I performed a diagnostic for an air conditioner. Cust said the ac unit is not cooling the home. No cooling traced back to a bad 20 amp fuse in the disconnect. Replaced bad fuse test ran system found compressor is pulling 18 amps. Told customer that he should start budging for a new system. He is gonna see if it makes it through this year and see how long we can make it work. Recommended a less thick air filter and a maintenance at the beginning of summer next year. Also customer is gonna remove the tree growing around the unit and rinse coil out himself after he removes the tree.