Bruce W Havelock , NC October 17, 2017 Appliance: Whirlpool Dryer LER7620LW0 Whirlpool Dryer Ler7620lw0: The timer on my dryer was not working also the lint screen was in need of replacement. How to replace Dryer Lint Screen Filter. After having watched the video on AppliancePartsPros.com I was able to replace the timer with no problem. It only took 15-20 minutes to complete the job. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes