I completed the A/C check that came with the new furnace. I completed an electronic leak check on the indoor coil and didn’t find any leaks. Adjusted the fan speed for the proper CFM. The refrigerant pressures tested out good. Checked over the electrical, the contactor and capacitor have proper voltage. I used my megohmmeter on the compressor leads to check the insulation on the motor windings, they tested in the caution zone. The system is running properly. I recommend annual maintenance to maximize the life of the cooling and heating systems. I left the 16X25X4 filter on the filter box next to the furnace.