Thomas L Seneca Falls , NY November 04, 2019 Appliance: LG Dryer DLG3171W Lg Dryer Dlg3171w / : Rusty dryer heat vent. How to replace Duct Assembly (Exhaust). Easily found the part in a diagram on here, ordered it and it came 2 days later. Easy peasy. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes