Arrived at customers residence and was greeted by the customer and was led to the thermostat and it is functioning properly at this time. And continued to the furnace and coil in basement. Inspected tape and duct work joints and they are tight and neat and without any visible air leaks or issues at this time. Inspected manual damper and it is functioning properly at this time. Inspected 14x14x1 filter and it is dirty at this time. Inspected 4 inch flue pipe and it is tight and neat to the furnace at this time and is supported by three screws per joint as per code at this time. Refrigerant lines are tight and neat, and arma flex insulation is intact without any visible defects at this time. inspected gas, line into furnace And is tight and neat at this time. Inspected Manual gas shut off valve and it is functioning properly at this time. Inspected CS one safety switch and it is functioning properly at this time. Inspected easy trap safety switch and it is property at this time. Inspect