I performed comprehensive furnace maintenance on a Carrier 58TP high-efficiency gas furnace. Cleaned the burners and flame sensor using a wire brush and emery cloth. Inspected the heat exchanger for cracks using a borescope. Replaced the worn draft inducer motor with a factory OEM part. Checked gas pressure and adjusted to manufacturer specifications. Conducted a combustion analysis to ensure optimal efficiency. Replaced the air filter with a MERV 11 pleated filter and calibrated the thermostat. All operations were verified for safe and efficient performance.