Wide sealed top, a hot center, and two burners that can hold a whisper of flame: that is the SGSX365TS in a sentence. It pairs the 16,000 BTU middle burner with a pair of ExtraLow simmer burners for 58,200 BTU on natural gas, and each burner wears Thermador’s Star shape to spread flame evenly under the pan.
Owners tend to call about the delicate work, such as sauces that scorch because the simmer no longer holds. Those problems nearly always live in the ExtraLow knob and valve stem, where wear or buildup upsets the lowest setting. Beyond simmer control, the repair profile is mechanical: igniters coated with spills, caps that rock on their burners, and nothing that needs electronic testing.
We check the quiet burner first, with the middle burner as a reference for what normal flame looks like on that cooktop.
Wear in the ExtraLow valve stem or grime in the knob detent is the usual reason, because the lowest setting is the most sensitive. Gas pressure is rarely the cause when the other burners run well.
The electrode beside that burner is probably stuck, damp or coated with residue, so it keeps sparking. Letting it dry and cleaning it helps, and if it continues we replace it.
It matters for cleaning more than repair. The wide flame pattern depends on clear ports and a correctly seated cap, so debris or a tilted cap is the first thing we look for when a flame looks uneven.
Request a visit online in about a minute or phone our coordinators. Close-in neighborhoods often see a same-day slot; the outer counties usually get the next day across Houston.