**Work Performed:** Performed maintenance on 2020 Lennox modulating communicating furnace. Found spider webs in the burner tray causing a flame rollout condition. Cleaned entire furnace thoroughly and verified proper ignition and combustion. **Findings:** * Spider webs in burner tray caused temporary flame rollout. * All burners cleaned and operating correctly. * Furnace tested through full heating cycle and all operations are normal. * Furnace in good working order at this time.