Completed furnace tuneup, completed a humidifier tuneup.Checked high-voltage wiring and low-voltage wiring, all wiring is stable and firm.Checked all drains and uncloged drains. All drains are draining properly. Changed out filters to humidifier And is working properly. Cleaned and re-calibrated safety switches. Performed combustion check on furnace, furnace combustion running properly. This system is working to manufacturer specifications.