Performed furnace diagnostic York split downflow closet. found system turned on right away, but error code for unit over heating. Found system working, unit over heating, checked blower capacitor 10@9.6. Checked gas pressure 3.6, lowered tiny bit. 3.4-3.5. Checked temp rise in specs. signing up for a yr of maintenance If problem consists call, we can test some more items, high limit accuracy, blower off delay