Performed preventative maintenance for high efficiency furnace. Customer replaced the air filter (16x25x1). Inspected all the electrical components. Confirmed proper high and low voltages. Tested the amp draw from the blower and inducer. Both are operating within the manufacturer spec. Customer stated the system still has a vibration noise but this time instead of end of cycle it’s during the beginning of the cycle. Made adjustments to vibration Dampening mounts to get rid of the inducer wheel rubbing. If this comes back or continues the ECM inducer assembly will need replacement. The end of cycle vibration noise has been solved with the new blower motor last year. Performed a combustion analysis on the furnace. System is operating at 95.3% efficiency with a CO level of 11ppm. Cleaned the burners, flame sensor and burner box. System is operating properly at this time.