Upstairs system is not heating due to a low voltage issue. I also noticed no ss1 on condensate drain, recommend wet switch to ensure no water issues, run capacitor is out of manufacture specs, gas sediment trap isn’t up to code, blower wheel is dirty, inducer motor is over amping, hot surface igniter is worn out, evaporator coil is rusted out, and system is low on return air by a 10 inch duct. Also noticed rust, burnt, and small hole on heat exchanger. Based on our findings today, it might be time to think about getting a brand new system.