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 Lint Screen. 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