This video describes the troubleshooting and repair of a Thermador Gas Stove, with 4 top burners, and a gas oven. The appliance model is Thermador PRG304US. There is one of the top burners not working. The symptoms are as follows:
1. The ignitor is sparking.
2. There is no smell of gas.
3. No flame/ignition on the front left burner.
The stove model is a PRG304US. A lot of internal disassembly and assembly is described in detail. It may be helpful to watch no matter what issue you have, and just explore the disassembly and some internal parts. A very organized arrangement of the parts after disassembly is clearly explained, and shown. There are safety flags, and points of interest flagged also.