Furnace Maintenance Summary Equipment: Lennox High-Efficiency Furnace (2008) Fuel Type: Natural Gas Work Performed: • Completed routine furnace maintenance and operational inspection • Checked gas pressure and verified within manufacturer specifications • Performed combustion analysis – results within normal operating range • Inspected heat exchanger and verified operation through combustion analysis • Cleaned flame sensor • Inspected burners, ignition system, and flame pattern • Checked temperature rise – within acceptable range • Verified inducer motor operation and venting • Inspected safety controls and electrical connections • Tested furnace startup and shutdown sequence • Flushed condensate pump using vinegar to help remove buildup Client mentioned error on tstat due to outdoor sensor. Could not determine why this error showed up. The error has since been not showing on the thermostat. Checked thermostat -no concerns. Results: • Furnace is operating normal