David B Lincoln , NE February 23, 2017 Appliance: Model THERMADOR PRG364GLUS Left rear variable simmer gas burner on thermador prg364glus stopped working First and foremost, don't believe everything you see on Youtube. In order to get to the gas solenoid that feeds the burner you MUST take the entire top off that side of the range. Remove the grates and burner tops. You will see 2x 20mm brass nut, or so it appears, that hold each burner in place on the splash/drip pan. It is not just a nut, it is a venturi that threads down into what is called the jet holder. You may get a socket on it and think you are getting it loose but, more than likely you are spinning the jet holder, which has an aluminum gas line attached to it. The brass venturi has been treated with some kind of plumbers thread dope and if your range is of any age at all, I can promise you the venturi will be seized to the jet holder. I believe this may have been done to prevent any gas vapor from coming up through the threads and leaking outside the venturi. In my humble opinion, this is total OVERKILL. And here's why: the only ways to get the burner base off to then remove the splash pan, you have to get your dremel tool out and grind off the top of the 20mm brass venturi. Don't fool yourself into thinking that because you can spin the sucker with a socket and 1/2" flex handle its coming loose. Think again. If by some act of God the venturi comes loose it should turn fairly easily however, if it turns with abnormal resistance of any kind, you are twisting the gas line into knots. Once I ground the tops of of both venturi the burner bases came right off and that exposed the jet holders which have their own nut that holds them in place. Once you get the jet holders out you can try to unscrew the remaining venturi but, more than likely you will have to replace them too. All in all, you will need two jet holders, two jet holder nuts, two venturi and, while your in there replace the two clips that hold the ignitors to the splash pan. If you have to replace the gas line make sure you call these guys and make sure you order the right one. The catalog only showed three different lines, none of which were the one we(I talked to a rep)decided was correct. I got an email confirmation of my original order and I responded that the gas line I ordered was incorrect and PLEASE look for the right one. It took me about a week to complete the repair. I wasn't about to pay the local appliance repair thief to fix it for me. Trust me, he has a reputation. 28 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours