Sam G Paducah , KY December 31, 2015 Appliance: General Electric Gas Cooktop PGP989SN1SS Ge Cooktop Pgp989sn1ss: Broken gas valve. How to replace Water Inlet Valve (Refrigerator Ice/Water). I have never worked on a gas cooktop before, but I figured I'd give it a try before I paid for a service call. I replaced the bad valve. This wasn't a terribly difficult repair considering I was learning as I went. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours