David M Fullerton , CA January 28, 2017 One of the 4 control knobs was broken the others looked rather worn the best news was the knobs were delivered versed in 2 days and half the price of the manufacturer Easiest fix. Pulled the old ones off and pushed the new ones on. If only all such projects were this easy. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes