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Error Code

Kenmore Range F20 Code Door Lock or Board Communication Failure

Plain-language guidance for Kenmore code F20 Door lock or communication failure 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 F20 Door lock or communication failure 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 F20 Door lock or communication failure
Appliance Range
Quick answer

F20 on a Kenmore range is a lower oven door lock failure on Elite 721 models and a control communication failure on other series.

Model compatibility

Kenmore reuses codes across series and model years, so F20 Door lock or communication failure 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

Lower oven door lock failure, or a communication failure between control boards, depending on the series.

Which F20 do you have?

Kenmore range F20 means
Elite electric, model numbers starting 721 Lower oven door lock failure
Elite double-oven gas, model numbers starting 721 Lower oven door lock failure
Elite slide-in electric, starting 790.4671 Oven control board and user interface control board cannot communicate
Freestanding electric, glass touch panel Oven control board and surface burner control system cannot communicate
Self-cleaning electric, 2014 models Electronic oven control board and electronic surface element control cannot communicate

Owner-level checks by series

  • Elite 721 models: unplug the range and look at the harness connections from the lower oven door lock motor to the relay control board, and from the door lock switches to the oven control board. Loose wires go back on; broken wires need repair. Testing the lock motor with a meter is for a technician.
  • Elite slide-in 790.4671: with power disconnected, inspect the wiring between the user interface control board and the oven control board. Good wiring leads the manual to replace the user interface control board first.
  • Glass touch panel: with the range unplugged, inspect the harness connections between the oven control board and the glass touch panel and cooktop user interface control board. Beyond that, a service technician has to do live voltage checks.

More codes of this kind

  • F23: another communication failure, involving the convection fan speed control board
  • F24: paired with F23 in the manual
  • F1E2: oven control board failure

Kenmore range repair near you

People in the Miami, New York, Houston, Los Angeles and San Diego metro areas can phone (844) 747-3641 for range help. Say which series you have, read out F20 and the model number, and mention anything you checked. The range repair section has more.

Source: Sears PartsDirect – Kenmore Elite 721 electric range; Sears PartsDirect – Kenmore Elite slide-in electric range codes; Sears PartsDirect – Kenmore glass touch electric range; Sears PartsDirect – Kenmore Elite 721 gas range; Sears PartsDirect – Kenmore 2014 self-cleaning electric range

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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References

Sources & references

Supporting manuals and references used for this error-code guide.

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