Tech Cody arrived to customers home. I went to the indoor closet furnace and did a diagnostic of system startup. All the safeties functioned as they should and furnace started up with no issue at all. Inducer fan motor pulling point three amps was below the manufacturer specifications. Customer had air scrubber and UV light installed on system. I replaced the filter for the customer. Once I took a look into the attic and saw the insulation I noticed that it was very low and I notified the homeowner that they need to be getting some insulation soon.