Blue shield fall service. Replaced filter. Blower motor is ECM, no run capacitor required, hot surface ignitor checked good, cleaned and checked flame sensor, pressure switch checked good, all limits and safeties checked good inducer motor run load amps are within mfg specs, manifold pressure is 3.5 in wc, within mfg specs, air temperature rise was 51 deg, within mfg specs. Checked system operation with tstat. System operating normally. Carbon monoxide- 0ppm Performed courtesy check on electric air handler, blower motor run capacitor checked good, heat sequencer and blower relay operating normally, heat strips (2) checked good, drawing 16.7 amps each, system operating normally.