Tom J Creedmoor , NC June 06, 2016 Timer knob broke WE WERE VERY DISAPPOINTD THAT THE TIMER KNOB ONLY LASTED ABOUT 18 YEARS. FORTUNATELY, ALL IT TOOK TO FIX IT WAS A NEW KNOB WHICH WE ATTECED AS SOON AS IT CAME IN. HOPEFULLY, IT WILL LAST ANOTHER 18 YEARS OR MORE. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes