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Error code reference
Whirlpool Range Error Code 21
Oven sensor opened (lower oven circuit).
SourceWhirlpool Range - Tech Sheet: Diagnostics & Error Codes (W10182521)p. 2
Diagnostic procedure
The full 21 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Unplug range, disconnect sensor from harness, measure sensor resistance between connector pins (approx. 1080 ohms at room temperature). If measurements do not correlate to real temperature, replace sensor.
SourceWhirlpool Range - Tech Sheet: Diagnostics & Error Codes (W10182521)p. 2
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
1 manual in the MyPros+ library documents this code for Whirlpool range.
Models covered by the manuals that document this code
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