No heat on the only system, located in the garage. Circuit board is bad and not allowing the heat to cycle completely. Works on and off. Also, draft inducer motor has high amperage and heat exchanger is cracked. I observed biological growth I. The evaporator coil , evaporator coil drain pan and return and supply plenum, as well. Filter is located inside the furnace cabinet and it’s leaning against the blower motor. Blower wheel is dirty. No drain pan under the system and there is no flood protection devices installed. System is 29 years old and not heating with heat exchanger cracked and biological growth inside the system, that affects the air quality in the house. Sent estimates for potential repairs (not recommend), but, at this age and conditions, the best option would be to upgrade the system, with 10 years old warranty and WiFi thermostat. Set a lead to quote upgrading for today after 3 pm. We will credit 98,00 spent today , if customer upgrade the system.