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Error Code

Kenmore Cooktop 21 Code Defective Key

Plain-language guidance for Kenmore code 21 on Cooktop — symptoms, safe checks, and when to call a technician.

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At a glance

Error code overview

A plain-language snapshot of 21 for Kenmore Cooktop — 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 21
Appliance Cooktop
Quick answer

Code 21 reports a defective Timer Down key on 790-series Kenmore induction cooktops. The manual starts with disconnecting power.

Model compatibility

Kenmore reuses codes across series and model years, so 21 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

21 reports a defective Timer Down key.

Short answer

  • Output: 21.
  • Condition given: Timer Down key defective.
  • Model range: Kenmore induction, numbers beginning 790.

Neighbouring messages

Next steps

Disconnect power and let a technician test the harness. If it is sound, they replace the center touch control board.

Reach Kenmore cooktop service

Cooktop owners in the Miami, New York, Houston, Los Angeles and San Diego metro areas can book Kenmore cooktop repair at (844) 747-3641. Have the 21 code and model number written down.

Source: Sears PartsDirect – Kenmore 790 model induction cooktop error codes

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
Hours Mon–Sat: 8:00 AM – 7:00 PM
Service area Serving Miami, New York, Houston, Los Angeles and San Diego metro areas.
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