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Error code · Range

Whirlpool Range Code 1D21: Concern from the Oven Heat Reading

A display of 1D21 on a Whirlpool freestanding or slide-in range, such as the WFE525S0HS, sends us to the oven temperature sensor, the control and the wiring joining them. The control watches the sensor to decide…

Medium · inspection needed
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Code
1d21
Appliance
Range
Brand
Whirlpool
Warranty
30-day workmanship

What 1d21 means

A display of 1D21 on a Whirlpool freestanding or slide-in range, such as the WFE525S0HS, sends us to the oven temperature sensor, the control and the wiring joining them. The control watches the sensor to decide when to heat, so a doubtful reading leads to a code. Expect an oven that may fail to preheat properly or stop a cycle early, with 1D21 shown until the power is cycled.

Common causes of 1d21

  • The oven temperature sensor
  • The oven control board
  • The harness and plugs between them
✓ One safe check you can try

1. Shut off the range's breaker for one full minute. 2. Switch it back on. 3. Wait about a minute and watch for 1D21. 4. Try a short bake to see whether the oven comes up to heat. 5. If gas is ever smelled on a gas range, leave the house and call the gas utility from outside.

! Why to stop there
  • After the reset we still do not know which of the three places set the code.
  • We check the sensor's connection and its reading before looking at the board.
  • You get a written price first, and our work has a 30-day workmanship warranty.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
→Same appliance

Other Range codes

PUSH or PSHWhirlpool Range PUSH or PSH: Start Was Not Pressed Sabbath ModeWhirlpool Range Sabbath Mode: Why the Oven Stays On Sabbath, Sab, 5Ab, or 5A7Whirlpool Range Sabbath, Sab, 5Ab or 5A7: Canceling the Mode FEE6Whirlpool Range Code FEE6: Bake Element Circuit FEE7Whirlpool Range Code FEE7: Checking the Broil Element Circuit FEE8Whirlpool Range Code FEE8: Oven Reset, No Part Named Indicator FlashingWhirlpool Range Indicator Flashing: Stuck Key or Control Setting Indicator or Hot Light OnWhirlpool Range Hot Light On: Control Still On or Surface Hot
1d211d21 questions
Is 1D21 a gas problem?

No, the code concerns the temperature reading and the control. It appears on gas and electric models alike. If you ever smell gas, leave the house and call the gas utility.

My oven preheats slowly. Is that 1D21?

Slow heating can have several causes, so we cannot say from the code alone. A sensor check helps us find whether the reading is the issue.

Can I cook with the range top?

Often the burners run separately from the oven control, but we cannot promise that for every range. If anything looks wrong, stop and call us.

Book a visit

Still seeing 1d21?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107