Dispatched for furnace tune-up. The components that are tested during the tuneup are heat exchanger, flame sensor, igniter, blower wheel, inducer, temp split and combustion in the heat exchanger. During the inspection of the furnace, there was a few fault in the system. The first fault of the system is the heat is blocked by the coil and is over heating the heat exchanger and the other components of the furnace. The second fault is the heat exchanger has prematurely failed due to the excessive amount of heat and is not able to cool down properly. The third fault is there is no air box to direct the air after it passes the coil. And this is pushing the air back against the blower motor and is creating excess amount of work on the blower motor. Thank you for allowing us in your house to provide the perfect home service and for being a member of the perfect family service club from your LBA Lead Service tech Calvin. If I provided a positive or five star experience. I’d appreciate yo