I was a professional technician at Dor-Mar Heating & Air Conditioning. I received a call from a client who was experiencing issues with their furnace and air conditioner. Upon arrival, I checked the thermostat, furnace, and air conditioner. The thermostat was operational, but the furnace had a failed heat exchanger. The air conditioner outside was not turning on due to a bad capacitor. I swapped out the capacitor and cleaned up the unit. The client wanted to replace their furnace to fix airflow issues. I found a great deal on a fully modular furnace that would meet their needs.