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Error Code

Kenmore Range Code 4d/51 Switch Disagreement

Plain-language guidance for Kenmore code 4d/51 on Range — symptoms, safe checks, and when to call a technician.

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At a glance

Error code overview

A plain-language snapshot of 4d/51 for Kenmore Range — confirm the model series before you act.

Daniel Reeves Written by Daniel Reeves Appliance Repair Content Specialist Published October 20, 2026

Content status Verified

Error code 4d/51
Appliance Range
Quick answer

4d/51 on a Kenmore 665 model range means the oven door and lock switches disagree.

Model compatibility

Kenmore reuses codes across series and model years, so 4d/51 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

Plain language

What this code means

Oven door and oven door lock switches disagree.

What 4d/51 flags

Two switches inside a Kenmore 665 model freestanding range, one for the door and one for its lock, are reporting conflicting states. Owners see 4d/51 when that happens; 4d/11, 4d/12 and 4d/52 are filed in the same entry.

Order of checks

  • Cycle the door and watch the lamp inside the oven. A lamp that ignores the door points to a new oven door switch.
  • A lamp that responds properly moves the manual on to the lock side: unplug the range and push any loose wires back onto the lock assembly harness.
  • Damaged harness or visibly damaged lock assembly: each is replaced.

Related codes

  • 4d/11: same switch conflict
  • 4d/52: sibling code
  • 9d/11: oven door lock assembly defective
  • 3d/21: defective oven temperature sensor

Range repair help in the Miami, New York, Houston, Los Angeles and San Diego metro areas

A Kenmore range with 4d/51 on the display can be booked through (844) 747-3641 across the Miami, New York, Houston, Los Angeles and San Diego metro areas. Say which model number it is and what you tried. See also Kenmore range service.

Source: Sears PartsDirect – Kenmore 665 model freestanding range error codes (slash format)

Caution

Safety warning

Important safety warning

Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.

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(844) 747-3641
Phone (844) 747-3641
Email info@kenmoreservicecenter.support
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