George M Conway , AR August 30, 2015 Appliance: Whirlpool Gas Range SF5140ERW4 Whirlpool Range Sf5140erw4: Clock/timer unit had numerous led segment failures. How to replace Clock, Timer. Pulled the stove out from the wall, unplugged the stove from the 120v. receptacle power source, removed about nine screws to free the back cover, pulled the control knobs off the face panel, disconnected quick disconnect from power terminals & removed defective clock/timer unit, set replacement unit into the panel and reversed the process to reassemble. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes