Tested system, not heating for the main level. Found a cracked igniter and found this to be due to a faulty control board that is sending constant power to the igniter. Also, the blower motor had a hard time starting due to a failing capacitor. The inducer motor is pulling over amps and we’ll see failure soon. The blower wheel and the drain line are extremely filthy and needs a cleaning. Also, the system has lots of rust buildup in and around the heat exchanger possibly leaking carbon monoxide. Cannot test carbon monoxide until the system is running. Based on our findings today, it might be time to think about getting a brand new system.