Furnace cleaning.... checked indoor system for leaks none found, Delta T was 20, static pressure was .60 inWC, blower wheel and coil has some calcium buildup on them, filter was pretty clean. Checked for leaks on outdoor system found none, voltage enhancement system was within factory spec 40/4 rated for 40/5. Checked all wiring connections, tighten ones that were loose. System running under normal conditions at this time.