Brad K Evansville , IN November 26, 2018 Appliance: Jenn-Air Surface Unit- Ddraft Gas CVG4380B Jenn-Air Cooktop Cvg4380b: Bad burner gas valve. How to replace Gas Burner Valve (Single). Installed new burner gas valve. Works great, the pros are very helpful.... Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes