Performed clean and check on gas furnace and humidifier. Conducted combustion analysis, measured temperature rise, tested all electrical components; inspected gas supply, burner, inducer and blower assemblies. Cleaned flame sensor and condensate trap, checked filter which does not need changed at this time. Found signs of wear on blower motor bearings but not enough to effect operations. Tested t-stat operations. Cycled system in heat and found everything to be operating within specifications at this time.