ApplianceField Lab
Field evidence

Two Left XLO Burners Stopped at the Same Time

This PRG366WH/03 uses individual burner controllers, but a simultaneous pair failure made the shared board path more important than ordering both controllers first.

Thermador prg366wh/03 Two Left Xlo Burners Dead

What the model discussion established

  • The exact model was Thermador PRG366WH/03.
  • Both left XLO burners were inoperative.
  • Individual burner-control modules were described as mounted at the valves.
  • The DSI-style control concept manages ignition and reignition.

A similar symptom can have a different cause on another range. Two failed burners can still share a command, supply or software path even when each has its own controller.

Why the shared board path came first

The proposed sequence was to verify supply from the main board and the state of relay K116 during a burner request. If the shared feed was absent, replacing both valve-mounted controllers would not address the upstream interruption.

The display board, which carries control software, remained a later branch if the main board path and individual controllers were proven.

What the thread did not prove

No service measurement or final part replacement was reported. The page therefore records the system layout and diagnostic order, not a confirmed K116 or board failure.

Gas and electrical safety: do not jumper burner-control relays or work on energized valve modules. Gas shutoff, electrical testing and combustion verification require qualified service.
Unexpected turn

A repair that did not follow the obvious path

An unusual turn supported by the case record Sub-Zero Not Cooling One Month After Sealed-System Repair A Sub-Zero stopped cooling a month after compressor and evaporator work. A clean evaporator shifted the diagnosis toward an oil-line restriction; the final repair …
Fresh field notes

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