Berge L Monterey , CA September 22, 2018 Appliance: Thermador Electric/Gas Range PRSE304S Thermador Range Prse304s: My 15 year old Thermador professional range two of the burners stop working. How to replace Venturi Gas Tube. I repaired it with new original replacement parts. Luckily they were still available. The only challenging part was the removal of the ventures from the holder which were seized solid and required to grid the top portion of them. Then I could access the solenoids which needed to be replaced to make the burners to function. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours