Clayton W Collierville , TN April 12, 2017 Appliance: KitchenAid Gas Range KGRS505XSS00 Kitchenaid Range Kgrs505xss00: Left front burner on cooktop was inoperative. How to replace Manifold Assembly. Since that one valve was $86 I opted to replace the whole manifold assembly for a grand total around $200. It took less than 30 minutes to complete the task. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes