Furnace cleaning. Air filter is a little dirty but not ready to be changed yet. Cleaned indoor fan. Cleaned burner system and flame safety system. Tightened all loose electrical connections. Scoped combustion chamber and found no areas of concern and did powder test. Incoming gas pressure was 7.2inWC. Outlet gas pressure was 4inWC. Adjusted outlet gas pressure to 3.5 inWC. Glow bar .5 amps Exaust removal system reads .63 amps. Indoor fan amps reads 3.88 amps. Heat rise is 72 degrees. Static pressure .84 inWC.