Arrived at customers residence and was greeted by the customer and was led to the thermostat and put it in heat mode and it is functioning properly at this time.ins-e Ted 20x25x1 filter and it is dirty at this time. Ins-extend tape and duct work joints and they are tight and neat at this time. Inspected 2” pvc flue pipes and they are tight and neat and pitched and primed and glued properly at this time.inspected condensate drain and it is clear at this time.inspected gas line and it is tight and neat and all joints and fittings are doped properly at this time. Maunual shut off valve is functioning properly at this time. Inspected emergency shut off switch is functioning properly at this time. Refrigerant lines are tight and neat and Arma flex insulation is tight and neat and without any visible defects at this time. Inspected drip pan under furnace and coil and it is dry and without any visible defects at this time. Inspected float safety switch on pan and it is functioning properly a