Performed comprehensive furnace tune-up service including correction of gas train pressure from 3.671 inWC to 3.30 inWC and clearing of condensate drain line and trap that contained accumulated spiderwebbing and debris. Verified proper operation of all critical components (inducer motor, capacitor, pressure switch, control board connections, and thermostat), confirmed moderate condition of return air filter, and documented combustion CO at 18 ppm, with furnace now operating normally with no immediate concerns.
