Troubleshooting a Goodman A/C not keeping up. Turned service call into A/C tune up. Washed outdoor coil. Checked indoor blower and coil for cleanliness. Checked both 16x20x1 air filters, filters were clean. Found system refrigerant levels to be off, and saw system showing over charged, reducing performance. Removed 8oz from system. Temp split went from 16-17 to 18-19 degrees. Opened a few supply vents that were closed off. Rest of system checks out ok with no other issues found.