Range Medium Severity
E14 Appliance Error Code

Thermador Range E14 Error: Selector Switch Error

Thermador range E14 error indicates selector switch error. Review the diagnostic steps below before calling a technician for help. What Does Thermador Range Error Code E14 Mean? The E14 error code on a Thermador Pro Grand, Pro Harmony, or Professional Series range indicates a fault in the oven function selector switch. The selector is the […]

By David Carter Lead Appliance Repair Specialist & Technical Writer

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Maybe. If only some selector positions trigger E14, you can use the oven on the positions that work. If every position fails, do not use the oven section. Surface Star Burners are unaffected.

Can I reset the code?

Yes. A reset can clear E14 temporarily but if the selector switch has worn contacts or the harness is loose, the error returns the next time the affected position is selected.

When to stop immediately?

Stop if you notice: E14 appears at every selector position, Burning smell from behind the control panel.

Symptoms You May Notice

Oven function knob feels normal but nothing happens

Turning the selector to Bake, Broil, or Convection produces no response from the oven controls.

Display shows the wrong cooking mode

You select Bake but the display indicates Broil or Convection Roast instead.

E14 appears immediately after a recent service call

The error first showed up after a technician opened the control bezel, suggesting a connection issue rather than a hardware failure.

Possible Causes

1

Failed selector switch

The mechanical selector switch behind the function knob has worn out internally or has loose contacts.

Requires Professional
2

Disconnected switch wiring harness

The harness from the selector switch to the control board has come loose at one of its connectors.

Requires Professional
3

Damaged control board input circuit

The input circuit on the control board that reads the selector switch has been damaged by a power surge.

Requires Professional

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Reset and try each function

    Reset the range at the breaker. After power restores, slowly try each oven function position on the selector knob and note which ones cause E14 to appear.

    If only one or two positions trigger the error, the switch contacts for those positions are worn out. If every position triggers it, the harness is the more likely cause.

  2. 2

    Visually inspect the knob shaft

    Pull the function knob straight off the shaft. Look for any visible damage, loose set screws, or play in the switch shaft.

    A loose knob can fool you into thinking the switch is broken when actually the knob just is not turning the shaft properly.

When to Call a Professional

Contact a qualified technician if:

  • Switch contacts show no continuity in any position
  • Visible damage or carbon marks on the switch terminals
  • E14 returns immediately after every reset

Need Professional Help?

Find qualified technicians in your area for proper diagnostics and repair.

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More Range Error Codes

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E13 E5 E12 E9 E11 E7 E6 E4 E3 E1 E2