ApplianceField Lab
Field evidence

Both Heating Modes Failed in Only the Upper Oven

Because bake and broil were both dead in one cavity, the useful question was what those modes share—not which element to replace first.

Dacor Upper Cavity No Bake Or Broil

What was actually observed

  • The appliance was a Dacor double wall oven.
  • The upper cavity did not heat in either bake or broil.
  • The exact model was not included in the preserved discussion.
  • The model label was located behind a grille.

A similar symptom can have a different cause in another oven. Two failed modes in one cavity make a shared path more useful to test, but they do not prove a specific part.

The Dacor double oven whose upper cavity lost both heating modes.
The Dacor double oven whose upper cavity lost both heating modes.

The two branches raised by the case

The service diagram was the deciding reference. If that revision placed a high-limit in the upper-cavity heating path, continuity through that safety device was the first branch to verify. If there was no separate high-limit, the control and its shared relay path remained the leading branch.

This is a diagnostic fork, not proof that every Dacor no-heat complaint is a high-limit or board failure. The source ended before either path was measured.

What to record before service

  • Confirm whether the lower cavity still heats in both modes.
  • Record whether the upper convection fan and display still operate.
  • Photograph the complete model label and any displayed code.
  • Note whether the failure followed self-clean, a power event or overheating.
High-voltage and heat safety: an oven can contain 240 V even when its display is dark. Disconnect power before internal access; do not bypass a high-limit or test exposed energized terminals as a homeowner.
Reported outcome

What actually fixed another documented case

Includes a reported repair outcome Samsung Gas Oven Igniter Glowed but Could Not Hold the Valve A Samsung gas oven igniter glowed and the burner lit, but operation was unstable. Replacing the marginal igniter resolved the case.
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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