Technician arrived to perform a furnace maintenance on a 1999 Janitrol system technician adjusted gas pressure clean the flame sensor monitored heat, exchanger bearings amps and overall health of the system. Technician found a really bad spot on the heat exchanger. It is not cracked at this time, but it is deeply gouged looking like it could technician explained to the landlord he is wanting quotes, technician has already gotten involved via phone call will set up a time for Tim to provide estimates to the landlord