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Error Code

Kenmore Cooktop 21 Error Code

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.

Lena Hart Written by Lena Hart Appliance Repair Content Specialist Published October 20, 2026

Content status Verified

Error code 21
Appliance Cooktop
Quick answer

Code 21 on Kenmore 790 induction cooktops reports a defective Timer Down key. The manual says to disconnect power and test the harness connections.

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 means the Timer Down key is defective.

The 21 message

Your cooktop is telling you the Timer Down key is defective when it displays 21. Only Kenmore induction models numbered 790 are covered.

The fix

The manual begins with disconnecting power. Then comes a check of the harness cables and connections. Good connections mean the center touch control board is what gets replaced, by a technician.

Neighbouring codes

Keys with a similar fault:

Kenmore cooktop repair, Los Angeles

Reach the Los Angeles team at (310) 554-8899 for Kenmore cooktop service. Keep the model number, the 21 code and a list of what you tried at hand.

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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(310) 554-8899
Phone (310) 554-8899
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