PARTS ARE SPECIAL ORDER AND HAVE A LEAD TIME OF 7-10 BUSINESS DAYS TO ARRIVE ONCE ORDER IS PLACED Danny B and Brandon, replaced heat exchanger on package Unit, tested, system operational, Heat Exchanger has oils that need to burn off which when operated will give a burning smell inside of restaurant, turned on unit temporary to get most of the oils burnt out, explained to customer it will take awhile to burn off, system operational. Recommend replacing inducer motor due to wear and tear on motor and propeller wheel.