New 1 system PM- Checked heating operations of 2014 Goodman furnace. Replaced 16x25x1 filter(can also hold a 4” filter), Checked capacitor outputs and amp drawls, Inspected heat exchangers, Checked delta T, triggered safety switches, Cleaned flame sensor, Brushed burners, and cleared drain line. System is operating properly at this time. Pics uploaded Also noticed drain does not have a safety float switch to prevent water damage, a flex duct has insulation exposed, and I’m also going to recommend a carbon monoxide detector in home. Sending quotes to customer.